Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
The purpose of this study is to investigate the acute effects of different intensities (i.e., 50, 75, and 100% of maximal anaerobic power) of 4-s sprint interval exercise on physiological responses. Secondly, it will determine the relationship between intensity and recovery duration (i.e., 15, 30, or 45-s) that will stimulate the cardiovascular and metabolic systems.
Background Short sprint interval training (sSIT) is typically performed at maximal intensity, generating power far above what is needed to reach peak oxygen consumption (VOâ‚‚peak). However, the physiological effects of submaximal sprint intensities and different recovery periods are not well understood.
Study Aim This study examined how power output and oxygen consumption (VOâ‚‚) respond to repeated 4-second sprints at 50%, 75%, and 100% of maximal power (Pmax) with rest periods of 15, 30, or 45 seconds.
Methods Eleven recreationally active participants completed nine trials, each consisting of thirty 4-second cycling sprints under different intensity and recovery conditions.
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 50% Pmax and 15-s rest duration | Active Comparator | Participants used 50% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| 50% Pmax and 30-s rest duration | Active Comparator | Participants used 50% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| 50% Pmax and 45-s rest duration4 | Active Comparator | Participants used 50% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| 75% Pmax and 15-s rest duration | Active Comparator | Participants used 75% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| 75% Pmax and 30-s rest duration | Active Comparator | Participants used 75% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| 75% Pmax and 45-s rest duration |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Preventive | Behavioral | systematically investigate the acute physiological responses induced by three levels of %Pmax intensities (50% and 75% of Pmax and all-out efforts) with three varying rest periods (15, 30, and 45-s) between thirty 4-s sprints. |
| Measure | Description | Time Frame |
|---|---|---|
| Cardiovascular changes | The %VO2peak associated with repeated submaximal power sprints (%Pmax), particularly when paired with varying rest periods, remains unknown. The aim of this study was to systematically investigate the cardiovascular changes for better exercise programming, measured in mL/min/kg. | From enrollment (Day 1) to the end of treatment (9 trials) (Day 11), through study completion, an average of 5 weeks. |
Not provided
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Human Performance Laboratory, Department of Kinesiology and Health Education, the University of Texas at Austin | Austin | Texas | 78712 | United States |
Not provided
| ID | Term |
|---|---|
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001519 | Behavior |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Active Comparator |
Participants used 75% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| All-out Pmax and 15-s rest duration | Experimental | Participants used all-out Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| all-out Pmax and 30-s rest duration | Experimental | Participants used all-out Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training. |
|
| all-out Pmax and 45-s rest duration | Experimental | Participants used all-out Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training. |
|