Associations between the maximal functional reserve (MFR) in kJ·kg LLM−1 and the accumulated O2 uptake (a), the O2 consumed per watt (b), the O2 deficit in the MFR test (c), and the vastus lateralis O2 fractional extraction index (d), as well as association between the O2 deficit in the MFR test with the maximal accumulated O2 deficit (MAOD) (e) and the number of bouts performed in the MFR test after the first occlusion (f). Each point represents an individual subject. Male, blue circles; Female, pink triangles. Correlation coefficients and regression lines have been calculated using the individual values. n = 43; 30 males and 13 females.