Table 2 The content of the school-based PA sessions

Week 1–4:

Soccer FMSs training

50–60% HR_max

Jogging, dynamic stretching of limbs and trunk muscles

The PE teacher will briefly introduce the course content and objectives during the warm-up

70–90%HR_max

2–3 sets of combined exercise:

1) 5 × 10 shuttle run;

2) 50 m sprint

3) 10–15 push-ups

4) 20–30 deep squats;

5) 20–30 sit-ups;

6) 30-60 s basic hip bridge;

7) 30-60 s plank;

8) 30-60 s jumping jacks;

9) 30-60 s high knees

The PE teacher will select 6–8 movements to practice; During the interval, 1-min mark time will be performed during the recovery interval

70–90%HR_max

Practice in small groups:

1) Off-ball;

2) Throw-Ins;

3) Simple dribbling, passing and shooting;

4) Trapping;

5) Juggling

70–90%HR_max

Group-based game:

1) Dribble game;

2) Juggling soccer game;

3) Spot shooting game;

4) Small-size soccer match: 3 vs 3 or 5 vs 5

50–60% HR_max

Dynamic stretching and relaxation of the limbs and trunk muscles

Teachers will introduce common knowledge or stories related to soccer, basketball, and volleyball according to the progress of the PA sessions

Participants will be asked to share their feelings about the PA sessions

Week 5–8:

Basketball FMSs training

70–90%HR_max

Practice in small groups:

1) Passing (e.g., chest, push and bounce) and catching;

2) Dribbling (single or both hands);

3) Shooting (spot or move);

4) Foot work;

5) Layups (both hands)

70–90%HR_max

Group-based game:

1) Fixed-point shots;

2) Passing and catching games;

3) Dribbling relays;

4) Small-size basketball match: 3 vs 3 or 5 vs 5

Week 9–12:

Volleyball FMS training

70–90%HR_max

Practice in small groups:

1) Multi-directional forms of running, jumping, and skipping;

2) Passing (e.g., proper hand placement, proper stance, dig pass);

3) Serving (e.g., practice serving the ball against the wall or partner);

4) Setting (e.g., pass the ball to a teammate or over the net to the opposing team);

5) Triangle passing drill

70–90%HR_max

Group-based game:

1) Dig pass game;

2) Dig pass over the net game;

3) Serve and run drill game

4) Butterfly passing drill game