Muscle and intensity based hamstring exercise classification in elite female track and field athletes: implications for exercise selection during rehabilitation

Figures & data

Figure 1 Lunge Exercise.

Figure 2 Single leg Roman dead-lift T-drop exercise.

Figure 3 Kettle bell swing exercise.

Figure 4 Bridge exercise.

Figure 5 TRX exercise.

Note: TRX is a suspension trainer workout system that leverages gravity and your bodyweight.

Figure 6 Hamstring bridge exercise.

Figure 7 Curl exercise.

Figure 8 Nordic exercise.

Figure 9 Fitball flexion exercise.

Figure 10 Slide leg exercise.

Figure 11 Hamstring muscle component EMG (percent maximal voluntary isometric contraction) for each exercise.

Note: TRX is a Suspension Trainer workout system.
Abbreviation: EMG, electromyogram.

Table 1 Contraction type and kinetic chain

	No change	Shortening	Lengthening	Open kinetic chain	Closed kinetic chain
Lunge
Single leg Roman dead-lift T-drop
Kettle swing
Bridge
Bridge
TRX
Curl
Nordic
Fitball flexion
Slide leg

Notes: TRX is a Suspension Trainer workout system that leverages gravity and your bodyweight. Dark grey areas refer to the type of muscle contraction which recorded the higher EMG activity in every exercise and the light grey refer to the Kinetic Chain through which, each exercise is performed.

Abbreviation: EMG, electromyogram.