Skeletal Muscle Metabolism in Endurance Athletes with Near-Infrared Spectroscopy

Abstract

The recovery rates of mV˙O2 after exercise in endurance athletes were almost twofold faster than inactive subjects measured with NIRS, consistent with previous studies using muscle biopsies and magnetic resonance spectroscopy. Our results support the use of NIRS measurements of the recovery of oxygen consumption to assess muscle oxidative capacity.

Recent developments in near-infrared spectroscopy (NIRS) for the assessment of local skeletal muscle microvascular function and capacity to utilise oxygen

“…Brizendine et al. reported muscle $\dot{\mathrm{V}}{\text{O}}_2$ recovery time constants of the Vastus Lateralis were nearly twice as fast in endurance athletes as non-athletic, age-matched controls 61 . The effects of training and de-training on the recovery time constant of muscle $\dot{\mathrm{V}}{\text{O}}_2$ measured by NIRS have also been shown in wrist flexor muscles 63 .…”

“…Sensitivity of muscle $\dot{\mathrm{V}}{\text{O}}_2$ recovery kinetics to athletic capacity has been demonstrated by several groups 61, 62. Brizendine et al.…”

Evaluation of in vivo mitochondrial bioenergetics in skeletal muscle using NMR and optical methods

“…Due to limited light penetration through tissue in the visible region in vivo optical spectroscopy approaches are primarily confined to use of the near-infrared spectroscopy (NIRS) region of the spectra illustrated in Figure 1. Multiple approaches for in vivo measurement of oxygen consumption using NIRS have been developed for use on humans and animal models under dynamic conditions[68–73]. …”

Pilot Study: Evaluation of the Effect of Functional Electrical Stimulation Cycling on Muscle Metabolism in Nonambulatory People With Multiple Sclerosis

“…Another approach that can measure skeletal muscle mitochondrial function noninvasively is near-infrared spectroscopy (NIRS). 15 Our laboratory has designed a protocol that uses NIRS in combination with a rapid cuff inflation system, which blocks oxygen delivery and venous return, to measure kinetic changes in skeletal muscle oxygen consumption (m _ VO 2 ) after submaximal exercise. The advantage to using NIRS over 31 P-MRS is that it is relatively inexpensive (w$10,000e$70,000 vs $2 million) and more accessible.…”

“…The advantage to using NIRS over 31 P-MRS is that it is relatively inexpensive (w$10,000e$70,000 vs $2 million) and more accessible. NIRS has been shown to be reproducible, 15 independent of exercise intensity, 16 and able to identify changes caused by training status 15 or disability. 17 The evidence provides support that exercise is a necessary part of rehabilitation strategy to combat both primary motor and sensory loss and the secondary deconditioning that occurs because of decreased activity in people with MS.…”