Figure 4. Task-Dependent Differences in Muscle Contributions Within Synergy Modules. M1, synergy module 1; M2, synergy module 2; SP, standard push-up; PP, plyometric push-up; SSP, standard squat push-up; FCR, flexor carpi radialis; ECR, extensor carpi radialis; BB, biceps brachii; TB, triceps brachii; AD, anterior deltoid; PD, posterior deltoid; PM, pectoralis major; SA, serratus anterior; UT, upper trapezius; LD, latissimus dorsi; ES, erector spinae; RA, rectus abdominis. Bar plots show normalized muscle weights for each synergy module (mean ± SD). Brackets indicate significant differences between conditions, with corresponding P values displayed.