Massage Impairs Postexercise Muscle Blood Flow and "Lactic Acid" Removal.
WILTSHIRE, E. VICTORIA; POITRAS, VERONICA; PAK, MELISSA; HONG, TERENCE; RAYNER, JAY; TSCHAKOVSKY, MICHAEL E.
Medicine & Science in Sports & Exercise.
42(6):1062-1071, June 2010.
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Purpose: This study tested the hypothesis that one of the ways sports massage aids muscle recovery from exercise is by increasing muscle blood flow to improve "lactic acid" removal.
Methods: Twelve subjects performed 2 min of strenuous isometric handgrip (IHG) exercise at 40% maximum voluntary contraction to elevate forearm muscle lactic acid. Forearm blood flow (FBF; Doppler and Echo ultrasound of the brachial artery) and deep venous forearm blood lactate and H concentration ([La-], [H ]) were measured every minute for 10 min post-IHG under three conditions: passive (passive rest), active (rhythmic exercise at 10% maximum voluntary contraction), and massage (effleurage and petrissage). Arterialized [La-] and [H ] from a superficial heated hand vein was measured at baseline.
Results: Data are presented as mean /- SE. Venoarterial [La-] difference ([La-]v-a) at 30 s of post-IHG was the same across conditions (passive = 6.1 /- 0.6 mmol[middle dot]L-1, active = 5.7 /- 0.6 mmol[middle dot]L-1, massage = 5.5 /- 0.6 mmol[middle dot]L-1, NS), whereas FBF was greater in passive (766 /- 101 mL[middle dot]min-1) versus active (614 /- 62 mL[middle dot]min-1, P = 0.003) versus massage (540 /- 60 mL[middle dot]min-1, P < 0.0001). Total FBF area under the curve (AUC) for 10 min after handgrip was significantly higher in passive versus massage (4203 /- 531 vs 3178 /- 304 mL, P = 0.024) but not versus active (3584 /- 284 mL, P = 0.217). La- efflux (FBF x [La-]v-a) AUC mirrored FBF AUC (passive = 20.5 /- 2.8 mmol vs massage = 14.7 /- 1.6 mmol, P = 0.03, vs active = 15.4 /- 1.9 mmol, P = 0.064). H efflux (FBF x [H ]v-a) was greater in passive versus massage at 30 s (2.2 /- 0.4e-5 vs 1.3 /- 0.2e-5 mmol, P < 0.001) and 1.5 min (1.0 /- 0.2e-5 vs 0.6 /- 0.09e-5 mmol, P = 0.003) after IHG.
Conclusions: Massage impairs La- and H removal from muscle after strenuous exercise by mechanically impeding blood flow.
(C)2010The American College of Sports Medicine