Abstract
Purpose
To compare the effects of two post-activation potentiation (PAP) protocols using traditional or cluster-set configurations on countermovement jump (CMJ) performance.
Methods
Twenty-six male basketball-players completed three testing sessions separate by 72 hours. On the first session, subjects performed barbell jump squats with progressively heavier loads to determine their individual optimum power loads (OPL). On the second and third sessions, subjects completed two PAP protocols in a randomized order: three sets of six repetitions of jump squats using OPL performed with either a traditional (no inter-repetition rest) or a cluster-set (20s rest every two repetitions) configuration. After a warm-up, CMJ height was measured using a force platform before, 30 s, 4-min, and 8-min after completing the PAP protocols. The following kinetic variables were also analyzed and compared: relative impulse, ground reaction force, eccentric displacement, and vertical leg-spring stiffness.
Results
Across both conditions, subjects jumped lower at post-30s by 1.21 cm, and higher in post-4 min by 2.21 cm and in post-8 min by 2.60 cm compared to baseline. However, subjects jumped higher in the cluster condition by 0.71 cm (95%CI: 0.37, 1.05 cm) in post-30 s, 1.33 cm (95%CI: 1.02, 1.65 cm) in post-4 min, and 1.64 cm (95%CI: 1.41, 1.88 cm) in post-8 min. The superior CMJ performance was associated with enhanced kinetic data.
Conclusions
Both protocols induced PAP responses in vertical jump performance using jump squats at OPL. However, the cluster-set configuration led to superior performance across all time points, likely due to reduced muscular fatigue.
To compare the effects of two post-activation potentiation (PAP) protocols using traditional or cluster-set configurations on countermovement jump (CMJ) performance.
Methods
Twenty-six male basketball-players completed three testing sessions separate by 72 hours. On the first session, subjects performed barbell jump squats with progressively heavier loads to determine their individual optimum power loads (OPL). On the second and third sessions, subjects completed two PAP protocols in a randomized order: three sets of six repetitions of jump squats using OPL performed with either a traditional (no inter-repetition rest) or a cluster-set (20s rest every two repetitions) configuration. After a warm-up, CMJ height was measured using a force platform before, 30 s, 4-min, and 8-min after completing the PAP protocols. The following kinetic variables were also analyzed and compared: relative impulse, ground reaction force, eccentric displacement, and vertical leg-spring stiffness.
Results
Across both conditions, subjects jumped lower at post-30s by 1.21 cm, and higher in post-4 min by 2.21 cm and in post-8 min by 2.60 cm compared to baseline. However, subjects jumped higher in the cluster condition by 0.71 cm (95%CI: 0.37, 1.05 cm) in post-30 s, 1.33 cm (95%CI: 1.02, 1.65 cm) in post-4 min, and 1.64 cm (95%CI: 1.41, 1.88 cm) in post-8 min. The superior CMJ performance was associated with enhanced kinetic data.
Conclusions
Both protocols induced PAP responses in vertical jump performance using jump squats at OPL. However, the cluster-set configuration led to superior performance across all time points, likely due to reduced muscular fatigue.
| Original language | English |
|---|---|
| Number of pages | 6 |
| Journal | International Journal of Sports Physiology and Performance |
| Early online date | 15 Oct 2019 |
| DOIs | |
| Publication status | E-pub ahead of print - 15 Oct 2019 |
Keywords
- Ballistic exercise
- Basketball
- Explosiveness
- Neuromuscular capabilities
- Power
