1 Subjects: “...muscle activity...”

2 Subjects: “...parasternal intercostal muscles...”

3 Subjects: “...McKibben muscle...”

4 Subjects: “...triceps surae muscle...”

5 Subjects: “...muscle activation...”

6 Subjects: “...muscle activation...”

7 Subjects: “...muscle soreness...”

8 Subjects: “...trunk muscles...”

9 Subjects: “...force-varying muscle contraction...”

10 Subjects: “...force-varying muscle contraction...”

11 Subjects: “...force-varying muscle contraction...”

12 Subjects: “...quantitative muscle ultrasound...”

13 Subjects: “...muscle strength...”

14 Subjects: “...muscle activities...”

15 Subjects: “...muscle activities...”

16 Subjects: “...muscle activities...”