Effectiveness of low-frequency vibration recovery method on blood lactate removal, muscle contractile properties and on time to exhaustion during cycling at VO2max power output

Abstract

The aim of the study was to determine the effectiveness of low-frequency vibration recovery (LFV-rec) on blood lactate removal, muscle contractile properties, and on time to exhaustion during cycling at maximal oxygen uptake power output (pVO(2max)). Twelve active males carried out three experimental sessions. In session 1, participant's maximal oxygen uptake (VO(2max)) and pVO(2max) were determined, and in sessions 2 and 3, the participants performed a fatiguing exercise (2 min of cycling at pVO(2max)) and then a 15 min recovery period using one of two different methods: LFV-rec which consisted on sitting with feet on the vibratory platform (20 Hz; 4 mm) and passive recovery (P-rec), sitting without vibration stimulus. After that, participants performed an all-out exercise test on cycle ergometer at pVO(2max). In the recovery period, variables such as heart rate (HR), blood lactate concentration [Lac], and tensiomyographic parameters (D (m): maximal radial displacement; T (s): time of contraction maintenance, and T (r): relaxation time) were measured. In an all-out exercise test, mean time to exhaustion (TTE), total distance covered (TD), mean cycling velocity (V (m)), and maximal HR (HR(max)) were also assessed. The results showed no effect of recovery strategy on any of the assessed variables; nevertheless, higher values, although not significant, were observed in TTE, TD, and V (m) after LFV-rec intervention. In conclusion, LFV-rec strategy applied during 15 min after short and intense exercise does not seem to be effective on blood lactate removal, muscle contractile properties, and on time to exhaustion during cycling at pVO(2max).

Comparison of tensiomyographic neuromuscular characteristics between muscles of the dominant and non-dominant lower extremity in male soccer players

“…TMG has demonstrated good-toexcellent inter-observer, intra-session, and between-day reliability for VM, VL, RF, and BF [4,21,25,26]. The parameters obtained by TMG are all based on the maximal displacement (D m ), which is the radial movement of the muscle belly after the application of the electrical stimulus, expressed in mm.…”

Tensiomyography of selected lower-limb muscles in professional soccer players

“…The extent to which this method may be reproduced and is considered valid was assessed by Krizaj et al (2008), Tous-Fajardo et al (2010) and Carrasco et al (2011) following the measurement protocol proposed by the manufacturers.…”

Assessment of eccentric exercise-induced muscle damage of the elbow flexors by tensiomyography

“…Based on this research, it is conceivable that the effects of EIMD, especially on the changes in mechanical parameters such as peak force and rate of force development (RFD), can be detected by Dm and Tc (Simunic et al, 2010): If a decline in peak force and RFD is observed then a similar response would be expected by Dm whereas an increase would be shown in Tc. These parameters have effectively detected fatigue as a result of firstly, cycling at maximal oxygen uptake power output (Carrasco et al, 2011) and secondly, following an ultra-endurance triathlon (Garcia-Manso et al, 2011). The endurance characteristics of rectus femoris in post-polyomelitic compared to healthy subjects have also been assessed by means of TMG (Grabljevec et al, 2005).…”