Table of Contents

Component Description

The cardiorespiratory endurance component (variable name prefix CEX) measured cardiorespiratory fitness using a treadmill exercise test. The goals of this component were to provide nationally representative data on cardiorespiratory endurance: 1) to provide endurance time reference values based on age-specific protocols; and 2) to study the association between cardiorespiratory endurance and other health conditions and risk factors, such as obesity, physical activity, and dietary patterns. 

Eligible Sample

Participants aged 6-11 years, who did not meet any of the exclusion criteria, were eligible for this component.

Participants were excluded from this component based on medical conditions, certain medications, physical limitations, and safety limitations. Exclusions included the following; 1) if a participant was told by a doctor that he/she should not participate in sports or other activities because of a heart condition or do only sports or other physical activities recommended by a doctor; 2) if a participant had a close biological relative whom died of heart problems or sudden death before the age of 35; 3) if a participant was unable to walk on a treadmill due to a physical limitation, such as amputations of a leg or foot; 4) if a participant had a pacemaker or automatic defibrillator; 5) if a participant was pregnant; 6) if a participant had untreated asthma or was prescribed medication for asthma before participating in exercise or sports, but had not brought the inhalant to the mobile examination center; or 7) if a participant was taking medications that indicated treatment for a medical condition that would be contradictory to performing a treadmill test, or if a medication taken affected the validity of the test results (i.e., beta blockers). Exclusionary medications include anti-arrhythmics, nitrates, beta-blockers, cardiac glycosides, ophthalmic beta-blockers, and antihypertensive/beta-blocker/diuretic combinations.

Protocol and Procedure

Cardiorespiratory endurance was assessed using age-specific maximal exercise test treadmill protocols (Appendix A). Each participant was assigned to one of three treadmill test protocols (varying in grade and speed). Each protocol was designed so that the participant walks and runs. The treadmill test protocols consisted of a 1-minute warm-up, seven 2-minute exercise periods, three 1-minute exercise periods designed for exceptionally fit youth, and a 2-minute recovery period. The goal of each protocol was to exercise the participant to volitional fatigue in 5-12 minutes. Two examiners were present at all times, one coaching the participant and the other one monitoring the equipment and heart rate.

Heart rate was monitored continuously using an automated monitor with four electrodes connected to the thorax and abdomen of the participant and was recorded at the end of warm-up, each exercise stage, and each minute of recovery.

The main outcome of this component is endurance time.

Detailed descriptions of the protocol are provided in the NNYFS Treadmill Examination Manual available on the NNYFS website at: http://www.cdc.gov/nchs/data/nnyfs/Treadmill.pdf

Quality Assurance & Quality Control

Examiners were regularly monitored by NCHS staff and field supervisors. Retraining sessions were conducted periodically with the examiners to reinforce the proper protocols and techniques. Inspection, calibration, and maintenance of the equipment and supplies were performed on a regular basis.

As part of on-going quality control practices, all data were reviewed systematically for logical or operational inconsistencies and examiner errors.

Data Processing and Editing

During the data processing, edits were made to ensure the logical consistency and analytic usefulness of the data. Extreme values were reviewed and cross-checked with other available data. When there was insufficient information to conclude that the values were invalid, they were retained in the dataset.

Variable specific editing

CEDEXSTS (Cardiorespiratory endurance exam status)
This derived variable indicates the following for each participant:
1. Exam completed maximal test conducted;
2. Exam was stopped early; or
3. Not done.

While we believe a maximal test was performed for most participants, we cannot rule out the possibility that the participant could have continued longer. Heart rate was the only objective measure collected during the treadmill test. Subjective indicators were also recorded, such as: 1) participants requesting to stop despite verbal encouragement of examiner/coach to continue; 2) unsteady gait; 3) breathlessness; and 4) inability to keep up with treadmill speed. These indicators are also included in the dataset. Analyst will need to determine what heart rate cut-offs to use in terms of assuming a maximal test. Additionally, in cases in which a participant did not meet the identified cut-off, the analyst should determine if the subjective indicators warrant the assumption of a maximal test.

CEDEXCMT (Comment code for Cardiorespiratory endurance fitness exam component status)
This derived variable denotes the reason the treadmill test was not done or data are missing. About 2.3% of participants who were eligible met exclusion criteria and an additional 5.0% have missing data because of refusal, not enough time, a safety issue that arose during testing, or inability to adhere to the protocol or because of a technical issue.
0 = None: the exam was completed with no missing data point present.
1 = Met exclusion criteria: exam was not done due to the participant meeting the exclusion criteria of the component as discussed above under eligible sample.
2 = Participant refusal: participant refused to undergo or continue the test.
3 = No time: the exam was not done because there was not enough time.
4 = Data acquisition problem: equipment failure or operator error.
5 = Safety issue: a safety concerns arose during the test that warranted an early stop of the protocol (e.g., shoes untied).
6 = Unable to adhere to the protocol: despite coaching from the examiner, the participant was unable to walk or run on the treadmill safely.
7 = Other.

CEXPROT (Assigned exercise protocol)
Each participant was assigned to one of three exercise test protocols depending on his/her age. Protocol one was assigned to participants aged 6-7 years, protocol two was assigned to participants aged 7-8 years, and protocol three was assigned to participants aged 9-10 years.

CEDEXLEN (Maximal endurance time [sec]) versus CEDTOTEX (Length of cardiorespiratory endurance exam component [sec])

There are two variables indicating time. The first one, CEDEXLEN, denotes the maximal endurance time, which is the time excluding warm-up and recovery in seconds. This is the actual exercise test endurance time. On the other hand, CEDTOTEX denotes the time of the entire exam, including warm-up and recovery time, in seconds.

CEDMAXHR (Maximal heart rate [bpm]) versus CEDENDHR ( Heart rate [bpm] at the end of test)
While CEDMAXHR (maximal heart rate) and CEDENDHR (heart rate at the end of test) are typically very similar, there are cases in which they differ. CEDMAXHR is the highest heart rate recorded during the exercise test and CEDENDHR is the heart rate recorded at the point in which the exercise period of the test protocol is stopped.

In two cases, during the end of the test, the heart rate monitor had difficulty recording accurately the heart rate. Information from the examiner indicated that the test was completed and the participant did likely exercise to volitional fatigue. In order to retain these participants, we provided as much information as possible on their ending heart rate. Therefore, in variable CEDMAXHR (maximal heart rate) and CEDENDHR (heart rate at the end of test), there are codes, 6666 and 8888, that indicate that although we do not know the final heart rate, we do know it was greater than a certain value. Analyst will need to decide on how to handle these cases. It is important that analysts not keep in the codes (i.e., 6666 and 8888) as this will influence an estimate of the mean or other parameters.

This dataset also includes information on the temperature and humidity pre-test and post-test, the grade(%) and speed (mph) at each warm-up, exercise test stage, and recovery stage, the amount of time spent in each stage, and the heart rate at the end of each stage.

Analytic Notes

The NNYFS examination sample weights should be used to analyze the cardiorespiratory endurance test data. Please refer to the NNYFS Analytic Guidelines for details on the use of sample weights and other analytic issues.

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 6 YEARS - 11 YEARS

CEDEXSTS - Cardiorespiratory endurance exam status

Variable Name:
CEDEXSTS
SAS Label:
Cardiorespiratory endurance exam status
English Text:
Cardiorespiratory endurance exam status
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Exam completed maximal test conducted 682 682
2 Exam was stopped early 17 699
3 Not Done 33 732
. Missing 0 732

CEDEXCMT - Comment code for CR endurance fitness

Variable Name:
CEDEXCMT
SAS Label:
Comment code for CR endurance fitness
English Text:
Comment code for CR endurance fitness exam component status
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 None 682 682
1 Met exclusion criteria 16 698
2 Participant refusal 4 702
3 No time 9 711
4 Data acquisition problem, equipment failure, or operator error 6 717
5 Safety issue 4 721
6 Unable to adhere to the protocol 3 724
7 Other 8 732
. Missing 0 732

CEDEXLEN - Maximal endurance time (sec)

Variable Name:
CEDEXLEN
SAS Label:
Maximal endurance time (sec)
English Text:
Total duration of exercise protocol
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28 to 1024 Range of Values 682 682
. Missing 50 732

CEDTOTEX - Length of CR endurance exam component

Variable Name:
CEDTOTEX
SAS Label:
Length of CR endurance exam component
English Text:
Total duration on treadmill
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
215 to 1227 Range of Values 682 682
. Missing 50 732

CEDMAXHR - Maximal heart rate (bpm)

Variable Name:
CEDMAXHR
SAS Label:
Maximal heart rate (bpm)
English Text:
Max Heart Rate
Target:
Both males and females 6 YEARS - 11 YEARS
Hard Edits:
0 to 230
Code or Value Value Description Count Cumulative Skip to Item
105 to 229 Range of Values 680 680
6666 >=185 1 681
8888 >=199 1 682
. Missing 50 732

CEDENDHR - Heart rate (bpm) at the end of test

Variable Name:
CEDENDHR
SAS Label:
Heart rate (bpm) at the end of test
English Text:
Heart rate (bpm) at the end of test
Target:
Both males and females 6 YEARS - 11 YEARS
Hard Edits:
0 to 230
Code or Value Value Description Count Cumulative Skip to Item
70 to 222 Range of Values 680 680
6666 >=185 1 681
8888 >=199 1 682
. Missing 50 732

CEXPROT - Assigned exercise protocol

Variable Name:
CEXPROT
SAS Label:
Assigned exercise protocol
English Text:
Predicted Protocol
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 A0 NYFS Ages 6-7 244 244
2 A1 NYFS Ages 8-9 214 458
3 A2 NYFS Ages 10-11 224 682
. Missing 50 732

CEXTEM1 - Pre-test Room temperature (Fahrenheit)

Variable Name:
CEXTEM1
SAS Label:
Pre-test Room temperature (Fahrenheit)
English Text:
Post-test Temperature (Degrees Fahrenheit)
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
60.9 to 79.4 Range of Values 681 681
. Missing 51 732

CEXHUM1 - Pre-test Room Humidity (%)

Variable Name:
CEXHUM1
SAS Label:
Pre-test Room Humidity (%)
English Text:
Pre-test Humidity
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
21.5 to 72.2 Range of Values 675 675
. Missing 57 732

CEXTEM2 - Post-test Room temperature (Fahrenheit)

Variable Name:
CEXTEM2
SAS Label:
Post-test Room temperature (Fahrenheit)
English Text:
Post-test Temperature (Degrees Fahrenheit)
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
64.1 to 76.8 Range of Values 681 681
. Missing 51 732

CEXHUM2 - Post-test Room Humidity (%)

Variable Name:
CEXHUM2
SAS Label:
Post-test Room Humidity (%)
English Text:
Post-test Humidity
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
21.5 to 72.9 Range of Values 675 675
. Missing 57 732

CEXWS - Warm-up speed

Variable Name:
CEXWS
SAS Label:
Warm-up speed
English Text:
Speed Warm-Up
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 2.5 Range of Values 682 682
. Missing 50 732

CEXWG - Warm-up grade

Variable Name:
CEXWG
SAS Label:
Warm-up grade
English Text:
Grade Warm-Up
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 0 682 682
. Missing 50 732

CEXWTIM - Amount of time spent in warm-up (sec)

Variable Name:
CEXWTIM
SAS Label:
Amount of time spent in warm-up (sec)
English Text:
Time Warmup
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
60 60 682 682
. Missing 50 732

CEXWHR - Warm-up heart

Variable Name:
CEXWHR
SAS Label:
Warm-up heart
English Text:
Heart Rate Warm-Up
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
90 to 168 Range of Values 682 682
. Missing 50 732

CEXS1S - Stage 1 speed

Variable Name:
CEXS1S
SAS Label:
Stage 1 speed
English Text:
Speed Stage 1
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2.5 to 3 Range of Values 682 682
. Missing 50 732

CEXS1G - Stage 1 grade

Variable Name:
CEXS1G
SAS Label:
Stage 1 grade
English Text:
Grade Stage 1
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 0 682 682
. Missing 50 732

CEXS1TIM - Amount of time spent in Stage 1 (sec)

Variable Name:
CEXS1TIM
SAS Label:
Amount of time spent in Stage 1 (sec)
English Text:
Time Stage 1
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
28 to 120 Range of Values 682 682
. Missing 50 732

CEXS1HR - Stage 1 heart rate (bpm)

Variable Name:
CEXS1HR
SAS Label:
Stage 1 heart rate (bpm)
English Text:
Heart Rate Stage 1
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
95 to 259 Range of Values 682 682
. Missing 50 732

CEXS2S - Stage 2 speed

Variable Name:
CEXS2S
SAS Label:
Stage 2 speed
English Text:
Speed Stage 2
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2.8 to 3.3 Range of Values 677 677
. Missing 55 732

CEXS2G - Grade Stage 2

Variable Name:
CEXS2G
SAS Label:
Grade Stage 2
English Text:
Grade Stage 2
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 0 677 677
. Missing 55 732

CEXS2TIM - Amount of time spent in Stage 2 (sec)

Variable Name:
CEXS2TIM
SAS Label:
Amount of time spent in Stage 2 (sec)
English Text:
Time Stage 2
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
20 to 120 Range of Values 677 677
. Missing 55 732

CEXS2HR - Stage 2 heart rate

Variable Name:
CEXS2HR
SAS Label:
Stage 2 heart rate
English Text:
Heart Rate Stage 2
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
92 to 199 Range of Values 677 677
. Missing 55 732

CEXS3S - Stage 3 speed

Variable Name:
CEXS3S
SAS Label:
Stage 3 speed
English Text:
Speed Stage 3
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3 to 3.5 Range of Values 674 674
. Missing 58 732

CEXS3G - Stage 3 grade

Variable Name:
CEXS3G
SAS Label:
Stage 3 grade
English Text:
Grade Stage 3
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2.5 2.5 674 674
. Missing 58 732

CEXS3TIM - Amount of time spent in Stage 3 (sec)

Variable Name:
CEXS3TIM
SAS Label:
Amount of time spent in Stage 3 (sec)
English Text:
Time Stage 3
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
71 to 120 Range of Values 674 674
. Missing 58 732

CEXS3HR - Stage 3 heart rate

Variable Name:
CEXS3HR
SAS Label:
Stage 3 heart rate
English Text:
Heart Rate Stage 3
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
107 to 200 Range of Values 674 674
. Missing 58 732

CEXS4S - Stage 4 speed

Variable Name:
CEXS4S
SAS Label:
Stage 4 speed
English Text:
Speed Stage 4
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3.2 to 5 Range of Values 671 671
. Missing 61 732

CEXS4G - Stage 4 grade

Variable Name:
CEXS4G
SAS Label:
Stage 4 grade
English Text:
Grade Stage 4
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 5 671 671
. Missing 61 732

CEXS4TIM - Amount of time spent in Stage 4 (sec)

Variable Name:
CEXS4TIM
SAS Label:
Amount of time spent in Stage 4 (sec)
English Text:
Time Stage 4
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 120 Range of Values 671 671
. Missing 61 732

CEXS4HR - Stage 4 heart rate

Variable Name:
CEXS4HR
SAS Label:
Stage 4 heart rate
English Text:
Heart Rate Stage 4
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
119 to 219 Range of Values 671 671
. Missing 61 732

CEXS5S - Stage 5 speed

Variable Name:
CEXS5S
SAS Label:
Stage 5 speed
English Text:
Speed Stage 5
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
3.5 to 5 Range of Values 622 622
. Missing 110 732

CEXS5G - Stage 5 grade

Variable Name:
CEXS5G
SAS Label:
Stage 5 grade
English Text:
Grade Stage 5
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
7.5 7.5 622 622
. Missing 110 732

CEXS5TIM - Amount of time spent in Stage 5 (sec)

Variable Name:
CEXS5TIM
SAS Label:
Amount of time spent in Stage 5 (sec)
English Text:
Time Stage 5
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 120 Range of Values 622 622
. Missing 110 732

CEXS5HR - Stage 5 heart rate

Variable Name:
CEXS5HR
SAS Label:
Stage 5 heart rate
English Text:
Heart Rate Stage 5
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
135 to 221 Range of Values 621 621
. Missing 111 732

CEXS6S - Stage 6 speed

Variable Name:
CEXS6S
SAS Label:
Stage 6 speed
English Text:
Speed Stage 6
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4.2 to 5 Range of Values 449 449
. Missing 283 732

CEXS6G - Stage 6 grade

Variable Name:
CEXS6G
SAS Label:
Stage 6 grade
English Text:
Grade Stage 6
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
10 10 449 449
. Missing 283 732

CEXS6TIM - Amount of time spent in Stage 6 (sec)

Variable Name:
CEXS6TIM
SAS Label:
Amount of time spent in Stage 6 (sec)
English Text:
Time Stage 6
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 120 Range of Values 449 449
. Missing 283 732

CEXS6HR - Stage 6 heart rate

Variable Name:
CEXS6HR
SAS Label:
Stage 6 heart rate
English Text:
Heart Rate Stage 6
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
70 to 221 Range of Values 447 447
. Missing 285 732

CEXS7S - Stage 7 speed

Variable Name:
CEXS7S
SAS Label:
Stage 7 speed
English Text:
Speed Stage 7
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4.5 to 5 Range of Values 206 206
. Missing 526 732

CEXS7G - Stage 7 grade

Variable Name:
CEXS7G
SAS Label:
Stage 7 grade
English Text:
Grade Stage 7
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12.5 12.5 206 206
. Missing 526 732

CEXS7TIM - Amount of time spent in Stage 7 (sec)

Variable Name:
CEXS7TIM
SAS Label:
Amount of time spent in Stage 7 (sec)
English Text:
Time Stage 7
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 120 Range of Values 206 206
. Missing 526 732

CEXS7HR - Stage 7 heart rate

Variable Name:
CEXS7HR
SAS Label:
Stage 7 heart rate
English Text:
Heart Rate Stage 7
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
76 to 222 Range of Values 206 206
. Missing 526 732

CEXS8S - Stage 8 speed

Variable Name:
CEXS8S
SAS Label:
Stage 8 speed
English Text:
Speed Stage 8
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
4.8 to 5.2 Range of Values 48 48
. Missing 684 732

CEXS8G - Stage 8 grade

Variable Name:
CEXS8G
SAS Label:
Stage 8 grade
English Text:
Grade Stage 8
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12.5 12.5 48 48
. Missing 684 732

CEXS8TIM - Amount of time spent in Stage 8 (sec)

Variable Name:
CEXS8TIM
SAS Label:
Amount of time spent in Stage 8 (sec)
English Text:
Time Stage 8
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 116 Range of Values 48 48
. Missing 684 732

CEXS8HR - Stage 8 heart rate

Variable Name:
CEXS8HR
SAS Label:
Stage 8 heart rate
English Text:
Heart Rate Stage 8
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
172 to 219 Range of Values 48 48
. Missing 684 732

CEXS9S - Stage 9 speed

Variable Name:
CEXS9S
SAS Label:
Stage 9 speed
English Text:
Speed Stage 9
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 to 5.4 Range of Values 19 19
. Missing 713 732

CEXS9G - Stage 9 grade

Variable Name:
CEXS9G
SAS Label:
Stage 9 grade
English Text:
Grade Stage 9
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12.5 12.5 19 19
. Missing 713 732

CEXS9TIM - Amount of time spent in Stage 9 (sec)

Variable Name:
CEXS9TIM
SAS Label:
Amount of time spent in Stage 9 (sec)
English Text:
Time Stage 9
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 60 Range of Values 19 19
. Missing 713 732

CEXS9HR - Stage 9 heart rate

Variable Name:
CEXS9HR
SAS Label:
Stage 9 heart rate
English Text:
Stage 9 heart rate
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
96 to 213 Range of Values 19 19
. Missing 713 732

CEXS10S - Stage 10 speed

Variable Name:
CEXS10S
SAS Label:
Stage 10 speed
English Text:
Speed Stage 10
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5.2 to 5.6 Range of Values 9 9
. Missing 723 732

CEXS10G - Stage 10 grade

Variable Name:
CEXS10G
SAS Label:
Stage 10 grade
English Text:
Grade Stage 10
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
12.5 12.5 9 9
. Missing 723 732

CEXS10TI - Amount of time spent in Stage 10 (sec)

Variable Name:
CEXS10TI
SAS Label:
Amount of time spent in Stage 10 (sec)
English Text:
Time Stage 10
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
6 to 64 Range of Values 9 9
. Missing 723 732

CEXS10HR - Stage 10 heart rate

Variable Name:
CEXS10HR
SAS Label:
Stage 10 heart rate
English Text:
Heart Rate Stage 10
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
196 to 213 Range of Values 9 9
. Missing 723 732

CEXRS - Recovery speed

Variable Name:
CEXRS
SAS Label:
Recovery speed
English Text:
Speed Recovery
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 2 682 682
. Missing 50 732

CEXRG - Recovery grade

Variable Name:
CEXRG
SAS Label:
Recovery grade
English Text:
Grade Recovery
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 0 682 682
. Missing 50 732

CEXRTIM - Amount of time spent in Recovery (sec)

Variable Name:
CEXRTIM
SAS Label:
Amount of time spent in Recovery (sec)
English Text:
Time Recovery
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
122 to 202 Range of Values 682 682
. Missing 50 732

CEXR1HR - Heart rate after 60 sec recovery

Variable Name:
CEXR1HR
SAS Label:
Heart rate after 60 sec recovery
English Text:
Heart Rate Recovery
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
83 to 214 Range of Values 682 682
. Missing 50 732

CEXR2HR - Heart rate after 60 sec recovery

Variable Name:
CEXR2HR
SAS Label:
Heart rate after 60 sec recovery
English Text:
Recovery Heart Rate Minute 2
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
79 to 185 Range of Values 681 681
. Missing 51 732

CEX220S1 - Unsteady gait

Variable Name:
CEX220S1
SAS Label:
Unsteady gait
English Text:
Unsteady gait
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 203 203
. Missing 529 732

CEX220S2 - Breathlessness

Variable Name:
CEX220S2
SAS Label:
Breathlessness
English Text:
Breathlessness
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 516 516
. Missing 216 732

CEX220S3 - Unable to keep up with treadmill speed

Variable Name:
CEX220S3
SAS Label:
Unable to keep up with treadmill speed
English Text:
Unable to keep up with treadmill speed
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 318 318
. Missing 414 732

CEX220S4 - SP requests to stop

Variable Name:
CEX220S4
SAS Label:
SP requests to stop
English Text:
SP requests to stop
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 625 625
. Missing 107 732

CEX220S5 - Coach requested to stop

Variable Name:
CEX220S5
SAS Label:
Coach requested to stop
English Text:
Coach requested to stop (noticed signs of severe exertion)
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 357 357
. Missing 375 732

CEX220J - SP is unable to stop gripping hand rails

Variable Name:
CEX220J
SAS Label:
SP is unable to stop gripping hand rails
English Text:
SP is unable to stop gripping hand rails
Target:
Both males and females 6 YEARS - 11 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 Yes 34 34
. Missing 698 732

Appendix A: Cardiorespiratory Endurance Test Protocols

TREADMILL PROTOCOL AGES 6-7

Stage

Seconds in stage

Speed (mph)

Grade (%)

WARM-UP

60

2.0

0.0

1

120

2.5

0.0

2

120

2.8

0.0

3

120

3.0

2.5

4

120

3.2

5.0

5

120

3.5

7.5

6

120

4.2

10.0

7

120

4.5

12.5

8

60

4.8

12.5

9

60

5.0

12.5

10

60

5.2

12.5

RECOVERY

120

2.0

0.0

 

TREADMILL PROTOCOL AGES 8-9

Stage

Seconds in stage

Speed (mph)

Grade (%)

WARM-UP

60

2.0

0.0

1

120

2.8

0.0

2

120

3.0

0.0

3

120

3.3

2.5

4

120

3.5

5.0

5

120

4.5

7.5

6

120

4.5

10.0

7

120

4.5

12.5

8

60

5.0

12.5

9

60

5.2

12.5

10

60

5.4

12.5

RECOVERY

120

2.0

0.0

 

TREADMILL PROTOCOL AGES 10-11

Stage

Seconds in stage

Speed (mph)

Grade (%)

WARM-UP

60

2.5

0.0

1

120

3.0

0.0

2

120

3.3

0.0

3

120

3.5

2.5

4

120

5.0

5.0

5

120

5.0

7.5

6

120

5.0

10.0

7

120

5.0

12.5

8

60

5.2

12.5

9

60

5.4

12.5

10

60

5.6

12.5

RECOVERY

120

2.0

0.0