Noninvasive Monitoring of Training Induced Muscle Adaptation with ³¹P-MRS: Fibre Type Shifts Correlate with Metabolic Changes

Table 2

Study design.

Time	Research/training
𝑡0	Spiroergometry/speed-strength tests; ^31P-MRS (7 days after sports tests); Biopsy (within 2 days after ^31P-MRS)
Week 1–8	Speed-strength training
𝑡𝑆-week 9	^31P-MRS (5 days after last training); Biopsy (within 2 days after ^31P-MRS)
Week 10–17	Endurance training
𝑡𝐸-week 18	^31P-MRS (5 days after last training); Biopsy (within 2 days after ^31P-MRS)
Week 19–26	De-training
𝑡𝐷	^31P-MRS; Biopsy (within 2 days after ^31P-MRS)