The Journal of the American Osteopathic Association, 2014/01, 114(1):e5-e6. doi: 10.7556/jom_2014_01.0001, type of study: ,ppt,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Full text    (https://www.degruyter.com/document/doi/10.7556/jom_2014_01.0001/html)

Keywords:

blood lactate [1]
exercise [124]
OMT [3924]
osteopathic manipulative treatment [3945]
pretest posttest design [240]
sports [158]

Abstract:

Introduction: Increased reliance on anaerobic glycolysis to meet metabolic energy demand (eg, intense exercise) results in elevated tissue and blood lactate/H+ levels. While lactate is an important gluconeogenic substrate, excess accumulation is associated with muscle fatigue and clinical lactic acidosis conditions (eg, heart failure). This study examined whether osteopathic manipulative treatment (OMT) can influence blood lactate clearance after high intensity exercise. Hypothesis: We hypothesized that postexercise OMT normalizes blood lactate more rapidly compared to other recovery protocols by optimizing ventilation and shifting core blood distribution and lymphatic flow to facilitate metabolic lactate clearance. Methods: After determining resting blood lactate, subjects completed a high intensity exercise regimen: 3 sets of progressive resistance recumbent cycling to maximum effort; 2-minute rest between sets. Following set 3, subjects underwent 1 of 3 post-exercise recovery protocols: (PR) Passive Recovery (rest-sitting position), (AR) Active Recovery (20 minutes low resistance cycling; rest-sitting position), or (OR) OMT Recovery (20 minutes OMT; rest-supine position). OMT was prescribed to increase thoracic excursion and to shift tissue and core blood distribution and lymphatic flow through neural reflex manipulation. Lactate was measured immediately after exercise and at 5-10 minute intervals for 60 minutes. Time course of lactate clearance was determined for each recovery protocol and statistically analyzed for differences. TUC-IRB approval M-0412. Results: High intensity cycling increased blood lactate 7.5-fold (10.5 mM ±0.6 SEM) relative to resting levels. Postexercise, the 3 recovery protocols displayed distinct time course patterns of lactate clearance. Consistent with other studies, AR group (n=10) lactate levels tended to be lower than PR values (n=12) through the observation period. Interestingly, OR subjects (n=5) displayed a consistent transient rise in lactate 5 minutes after initiation of OMT that declined thereafter; following a pattern that lagged behind AR subjects at certain time points (P<.05). Conclusion: Proposed mechanisms for this observation are hypothesized including supine position effects and our hypothesis that OMT may facilitate channeling of intramuscular lactate into the blood through lymphatics. Data may lead to a better understanding of mechanisms underlying lactate clearance, exercise recovery, and OMT.