Table 1
Participant Characteristics.
| CHARACTERISTIC | TOTAL (n = 41) | HIIT (n = 22) | MICT (n = 19) | P-VALUE |
|---|---|---|---|---|
| Age | 20.51 (1.94) | 20.00 (.98) | 21.11 (2.56) | 0.07 |
| Gender (%) | 0.49 | |||
| Female | 28 | 17 | 11 | |
| Male | 23 | 5 | 8 | |
| Race (%) | 0.06 | |||
| White | 31 | 14 | 17 | |
| Non-white | 10 | 8 | 2 | |
| Ethnicity (%) | 0.28 | |||
| Hispanic | 1 | 0 | 1 | |
| 30 minutes of exercise % | 0.71 | 0.73 | 0.68 | 0.76 |
[i] Note: Figures are reported as totals and means with standard deviations in parentheses.
Table 2
Condition Characteristics.
| HIIT | MICT | |
|---|---|---|
| Class Structure | 5-minute warm-up, 20-minute workout, 5-minute cool down | 5-minute warm-up, 20-minute workout, 5-minute cool down |
| Exercises | Jump squats, high knees, plank variations, burpees, jumping lunges | Walking in place, side stepping, front kicks, mini side lunge, grapevine |
| Breaks | 20 seconds of exercise followed by 10 seconds of rest repeated for four minutes, then a one-minute break | One minute break every five minutes |
| THZ | 70–85% | 55–70% |
[i] Note: THZ = Target Heart Rate Zone.
Table 3
Descriptive statistics for heart rate mean between conditions.
| VARIABLE | CONDITION | MID #1 | % IN THZ | MID #2 | % IN THZ | ||
|---|---|---|---|---|---|---|---|
| M | (SD) | M | (SD) | ||||
| Heart Rate | |||||||
| HIIT | 150.91 | 18.05 | 77.27 | 148.95 | 21.64 | 68.18 | |
| MICT | 123.58 | 23.57 | 68.42 | 128.53 | 16.12 | 84.21 | |
[i] Note: THZ = Target Heart Rate Zone.
Table 4
Descriptive statistics for FS-current and FS-enjoyment over time by condition.
| VARIABLE | CONDITION | PRE | MID #1 | MID #2 | POST | ||||
|---|---|---|---|---|---|---|---|---|---|
| M | (SD) | M | (SD) | M | (SD) | M | (SD) | ||
| FS-Current (Range: -5–5) | |||||||||
| HIIT | 2.32 | 2.03 | 2.14 | 1.75 | 1.95 | 2.19 | 2.68 | 1.84 | |
| MICT | 2.37 | 1.86 | 3.42 | 1.68 | 3.53 | 1.71 | 3.11 | 1.73 | |
| FS-Enjoyment (Range: 1–7) | |||||||||
| HIIT | 4.23 | 1.27 | 2.32 | 1.64 | 2.14 | 1.83 | 4.86 | 1.17 | |
| MICT | 4.16 | 1.12 | 2.63 | 1.71 | 2.79 | 1.51 | 4.63 | 1.30 | |
[i] Notes: FS = Feeling Scale. HIIT = High Intensity Interval Training. MICT = Moderate Intensity Continuous Training. Bold indicates a significant (p < .05) difference between the conditions.
Table 5
Descriptive statistics for the EFI subscales, PACES, FAS, and ESES over time by condition.
| VARIABLE | CONDITION | POSSIBLE RANGE | PRE | POST | |||
|---|---|---|---|---|---|---|---|
| M | (SD) | M | (SD) | ||||
| EFI-Positive Engagement | 0–12 | ||||||
| HIIT | 7.27 | –2.10 | 7.82 | –1.59 | |||
| MICT | 6.47 | –2.29 | 7.90 | –2.08 | |||
| EFI-Revitalization | 0–12 | ||||||
| HIIT | 6.00 | –2.33 | 7.14 | –2.49 | |||
| MICT | 5.21 | –2.37 | 7.05 | –2.09 | |||
| EFI-Physical Exhaustion | 0–12 | ||||||
| HIIT | 3.86 | –2.46 | 6.00 | –2.76 | |||
| MICT | 3.11 | –2.33 | 1.90 | –1.88 | |||
| EFI-Tranquility | 0–12 | ||||||
| HIIT | 8.00 | –3.21 | 6.18 | –2.46 | |||
| MICT | 6.00 | –2.36 | 6.95 | –2.70 | |||
| PACES | 18–126 | ||||||
| HIIT | 103.27 | –16.31 | 101.32 | –16.79 | |||
| MICT | 101.26 | –14.97 | 104.53 | –17.66 | |||
[i] Notes: EFI = Exercise-Induced Feeling Inventory. PACES = Physical Activity Enjoyment Scale. Standard deviations are listed in parentheses. Bold indicates a significant (p < .05) difference between the conditions.