Changes in muscle oxygenation during weight-lifting exercise

Abstract

The quantitative analysis of haemoglobin oxygenation of contracting human muscle during weight-lifting exercise was studied noninvasively and directly using near-infrared spectroscopy. This method was developed as a three-wavelength method which confirmed the volume changes in oxygenated haemoglobin (oxy-Hb), deoxygenated haemoglobin (deoxy-Hb) and blood volume (total-Hb; Oxy-Hb+deoxy-Hb). Nine healthy adult men with various levels of training experience took part in the study. Ten repetition maximum (10 RM) one-arm curl exercise was performed by all the subjects. Results showed that at the beginning of the 10-RM exercise, rapid increases of deoxy-Hb and decreases of oxy-Hb were observed. In addition, total-Hb gradually increased during exercise. These results corresponded to the condition of arm blood flow experimentally restricted using a tourniquet in contact with the shoulder joint, and they showed the restriction of venous blood flow and an anoxic state occurring in the dynamically contracted muscle. In three sets of lifting exercise with short rest periods, these tendencies were accelerated in each set, while total-Hb volume did not return to the resting state after the third set for more than 90 s. These results would suggest that a training regimen emphasizing a moderately high load and a high number of repetitions, and a serial set with short rest periods such as usually performed by body builders, caused a relatively long-term anoxic state in the muscle.

Gender comparison of peak oxygen uptake: repetitive box lifting versus treadmill running

“…Collins et al (1991) have suggested increased intra-thoracic and abdominal pressures during RL as factors that limit venous return. It has also been hypothesized that the isometric contractions involved in holding the load and maintaining control of the trunk during RL could result in reduced blood¯ow to the exercising muscle tissue, thus reducing the maximum utilization of oxygen (Reybrouk et al 1975;Tamaki et al 1994). These data clearly illustrate that volitional fatigue for RL is attained at a lower O 2 than for TR for both men and women, and this fact should be considered when determining acceptable work intensities for RL exercise (McGill et al 1995;Petrofsky and Lind 1978a;Sharp et al 1988).…”

Hypoxia and Resistance Exercise: A Comparison of Localized and Systemic Methods

“…Previously, ROS have been shown to promote growth in both smooth and cardiac muscle [82], and it is theorized that similar hypertrophic effects may occur in skeletal muscle [13,41,83]. However, while the activity of ROS within muscle is known to increase in ischemic conditions, particularly upon reperfusion [84], previous research by Takarada et al [8] reported no change in lipid peroxide levels following lowintensity resistance exercise either with or without BFR.…”

Oxygenation trends in vastus lateralis muscle during incremental and intense anaerobic cycle exercise in young men and women

“…Several studies have examined muscle oxygenation trends during static contractions of dierent muscle groups including the knee¯exors and extensors (Sahlin 1992), elbow¯exors (Kahn et al 1998) and forearm muscles (DeBlasi et al 1993). The changes in muscle oxygenation during dynamic resistance exercise (biceps curls) have also been reported (Tamaki et al 1994). Currently, there is minimal research pertaining to the trends in muscle oxygenation during high intensity anaerobic exercise.…”