| Description: |
ASSESSMENT
The purpose of the Wellness Fitness Initiative (WFI) assessment is to estimate the VO2 max of each participant, using commercially available equipment (treadmill, heart rate monitor, stopwatch, height/weight scales).
Max HR (max heart rate) = (208 – 0.7 x age)
THR (target heart rate) = 85% of max HR; (208 – 0.7 x age) * 0.85
- The participant straddles the treadmill belt until it begins to move. When the treadmill reaches approximately 1 mph, instruct the participant to step on to the belt. Then increase the speed to 3 mph at 0% grade. Monitor the participant’s heart rate continuously throughout the assessment.
- Start the stopwatch when the treadmill reaches 3 mph at 0% grade. Continue with this speed and grade for 3 minutes (steady state).
- After completing the 3-minute steady state interval, inform the participant that the speed will increase to 4.5 mph.
- Advise the participant that the assessment is a series of 1-minute intervals, alternating between speed and percent grade. All subsequent speed increases occur at 0.5 mph.
- At 4:01 minutes, increase the grade from 0% to 2%. At this time, inform the participant that all subsequent grade increases occur at 2% intervals.
- The assessment will continue until the participant’s heart rate exceeds the THR rate for 15 seconds, or the subject exhibits the medical criteria for early
termination.
- Once the heart rate exceeds the Target Heart Rate (THR), note the time and continue the assessment for an additional 15 seconds. Do not make any changes to the assessment speed or grade during this time. If the participant’s heart rate remains above the THR for the full 15 seconds,then stop the assessment and proceed to the cool-down phase. Record the total time, including the 3-minute warm-up, at which point the participant exceeds the THR. If the participant’s heart rate exceeds the target, but then drops back to the THR or below within 15 seconds,then the assessment should continue. The assessment is not complete until the participant’s heart rate exceeds the THR for 15 seconds. If this does not occur within 18 minutes, then terminate the assessment and record the time.
- Once the assessment is completed, the time is recorded. The participant should perform a cool-down for a minimum of 3 minutes at 3 mph, 0% grade. Continue to monitor the heart rate during the cool-down. Record the recovery heart rate at 1 minute of cool-down.
|
Time |
Speed (mph) |
% Grade |
| Trial |
0:00 – 1:00 |
3.0 |
0 |
| 1:01 – 2:00 |
3.0 |
0 |
| 2:01 – 3:00 |
3.0 |
0 |
| 3:01 – 4:00 |
4.5 |
0 |
| 4:01 – 5:00 |
4.5 |
2 |
| 5:01 – 6:00 |
5.0 |
2 |
| 6:01 – 7:00 |
5.0 |
4 |
| 7:01 – 8:00 |
5.5 |
4 |
| 8:01 – 9:00 |
5.5 |
6 |
| 9:01 – 10:00 |
6.0 |
6 |
| 10:01 – 11:00 |
6.0 |
8 |
| 11:01 – 12:00 |
6.5 |
8 |
| 12:01 – 13:00 |
6.5 |
10 |
| 13:01 – 14:00 |
7.0 |
10 |
| 14:01 – 15:00 |
7.0 |
12 |
| 15:01 – 16:00 |
7.5 |
12 |
| 16:01 – 17:00 |
7.5 |
14 |
| 17:01 – 18:00 |
8 |
14 |
| Recovery |
0:00 – 1:00 |
3.0 |
0 |
| 1:01 – 2:00 |
3.0 |
0 |
| 2:01 – 3:00 |
3.0 |
0 |
TERMINATE THE ASSESSMENT IF ANY OF THE FOLLOWING OCCURS:
- The THR is exceeded for 15 seconds.
- The THR has not been met after 18 minutes.
- The participant asks to terminate the exercise.
- The equipment malfunctions.
- Medical conditions arise that prohibit completing the
assessment.
Record the reason for terminating the assessment and the initial time the THR was exceeded (if applicable). Record time in minutes and convert second(s)into decimal. Use the test time (TT) the participant completed the assessment (i.e. exceeded the THR) along with the treadmill conversion formula to estimate VO2 max.
VO2 Max Calculation
VO2 max formula = 56.981 + (1.242 × TT) – (0.805 × BMI)
TT = time in minutes that THR was exceeded and test terminated
BMI = body mass index [body weight (kg)/height (m)^2]
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