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. 2019 Dec 3;318(2):E224–E236. doi: 10.1152/ajpendo.00233.2019

Fig. 1.

Fig. 1.

Study design. Gray rectangles indicate a high-intensity interval exercise (HIIE) session; gray triangles within high-volume, high-intensity interval training (HVT) indicate a 10-km cycling time trial; each rectangle and/or vertical pair of rectangles and/or vertical pair of rectangles and triangles, represents a training day; arrows indicate a skeletal muscle biopsy. Each test in both the pre- and post-HVT phase was separated by 48–72 h. 20k-TT, 20-km cycling time trial; GXT, graded exercise test; rest, skeletal muscle biopsy at rest; +0 h, skeletal muscle biopsy taken at the end of the HIIE session; +3 h, skeletal muscle biopsy taken 3 h after the completion of the HIIE session.