Cardiorespiratory and hemodynamic responses during repetitive incremental lifting and lowering in healthy males and females

Abstract

The purposes of this study were twofold. First, to evaluate the cardiorespiratory and muscle oxygenation (OXY)/blood volume (BV) responses during repetitive incremental lifting and lowering (RILL) in healthy males and females. Second, to develop a predictive equation for predicting peak aerobic power (VO(2peak)) during RILL from the cardiorespiratory, OXY/BV and body composition variables. Fourteen males and 18 females [mean (SD) for age, height and body mass were: 29.6 (8.2) years; 1.75 (0.07) m; 78.9 (10.4) kg and 23.9 (2.1) years; 1.63 (0.06) m; 62.3 (6.3) kg, respectively] completed a RILL from floor to table height at 10 lifts/min to voluntary fatigue. Cardiorespiratory responses were measured using open circuit spirometry and hemodynamic trends were monitored bilaterally at the third lumbar vertebra via near infrared spectroscopy. Significant sex differences ( p<0.05) were observed for the peak values of oxygen uptake (VO(2peak)), ventilation rate (V(E)), oxygen pulse, BV-max and BV-delta. Erector spinae OXY decreased systematically until VO(2peak )was attained, while BV decreased until approximately 50% of VO(2peak) and then leveled off. Stepwise regression analysis indicated that approximately 75% of the variance in VO(2peak )was predicted from cardiorespiratory, hemodynamic and body composition variables, with the most important predictors for absolute and relative VO(2peak )being V(E) ( r=0.75) and fat mass ( r=-0.63) respectively. Inclusion of left side OXY/BV responses increased the predictability of the common variance in VO(2peak )from 40% to 74%, implying that muscle hemodynamics play an important role in determining VO(2peak )during RILL.

In Vivo Erector Spinae Muscle Blood Volume and Oxygenation Measures During Repetitive Incremental Lifting and Lowering in Chronic Low Back Pain Participants

“…15 Specifically, trends for muscle blood volume and oxygenation were similar among groups and sides ( Figure 1). The observed muscle oxygenation trend was similar to that of the vastus lateralis muscle during other incremental activities.…”

“…A more detailed description of the repetitive incremental lifting and lowering protocol can be found elsewhere. 15 A portable metabolic analyzer (VmaxST, SensorMedics Corp., Yorba Linda, CA) was used to measure breath-by-breath cardiorespiratory responses. 21 The flowmeter was calibrated using a 3-L syringe of air.…”

“…The cardiorespiratory, muscle blood volume and oxygenation response of healthy participants to incremental work (i.e., repetitive incremental lifting and lowering) has been carried out. 15 Although information from healthy controls has provided normative data, no investigations have compared participants with chronic LBP to healthy controls on cardiorespiratory, muscle blood volume and oxygenation measures. The current investigation was undertaken to assess these differences between healthy controls and chronic LBP participants during incremental fatiguing work.…”

“…However, with the development and validation of near infrared spectroscopy, 8,9 it is now possible to noninvasively monitor erector spinae muscle blood volume and oxygenation changes during incremental exercise, 10,11 submaximal exercise, 12 static exercise, 13,14 and incremental work. 15 Change in muscle blood volume and oxygenation measures during incremental work provides insight into the local muscles supply and use of oxygen 10 during physical work.…”

Relationship between erector spinae muscle oxygenation via in vivo near infrared spectroscopy and static endurance time in healthy males

“…Near infrared spectroscopy is a valid (Mancini et al 1994;Tran et al 1999), reliable (Kell et al 2004;Maikala et al 2000), and non-invasive optical technique used to measure regional changes in muscle blood volume (Mbv) and oxygenation (Mox) in the microcirculation (i.e., arterioles, capillaries, and venules) (Chance et al 1992) during both dynamic (Chance et al 1992;Kell et al 2003) and static (Maikala and Bhambhani 2000;McGill et al 2000) muscle contraction. The optical technique is based on the differential absorption properties of chromophores, namely oxyhemoglobin (Hb) and myoglobin (Mb) in the near infrared range of 700 and 1,000 nm (Chance et al 1992).…”