Fig. 4From: Counteracting Age-related Loss of Skeletal Muscle Mass: a clinical and ethnological trial on the role of protein supplementation and training load (CALM Intervention Study): study protocol for a randomized controlled trialMagnetic resonance imaging analysis. We place slices as shown for analysis of cross-sectional area of the m. quadriceps femoris muscle and analyze slices 3 (counting in distal to proximal direction) and 4 for all subjects, and we use slice 4 for primary outcome evaluation. We fix the placement of slices in absolute distances, but we measure the femur length on dual-energy X-ray absorptiometric scans from the lateral tibial plateau (0Â %) to the top of the greater trochanter (100Â %) to report the relative placement of slices. Currently, placement of slice 3 ranges from 27Â % to 36Â % and slice 4 from 40Â % to 54Â % of the femoral length, depending on the height of the participantBack to article page