MAXIMAL AND VENTILATORY THRESHOLD RESPONSES TO TREADMILL AND WATER IMMERSION RUNNING

Citation
Dd. Frangolias et Ec. Rhodes, MAXIMAL AND VENTILATORY THRESHOLD RESPONSES TO TREADMILL AND WATER IMMERSION RUNNING, Medicine and science in sports and exercise, 27(7), 1995, pp. 1007-1013
Citations number
37
Categorie Soggetti
Sport Sciences
ISSN journal
01959131
Volume
27
Issue
7
Year of publication
1995
Pages
1007 - 1013
Database
ISI
SICI code
0195-9131(1995)27:7<1007:MAVTRT>2.0.ZU;2-0
Abstract
This study compared the metabolic responses of 13 endurance runners, f amiliar with nonweight-bearing water immersion (WI) running, at ventil atory threshold (T-vent) and maximal effort (V over dot O-2max) for bo th treadmill and WI running performance. Oxygen consumption (V over do t O-2), ventilation (V over dot (E)), heart-rare (HR), V over dot (E)/ V over dot O-2, respiratory exchange ratio (RER), perceived exertion ( RPE), and stride frequency (SF) were measured at T-vent and V over dot O-2max. Paired t-tests revealed higher V over dot O-2max (59.7 vs 54. 6 ml . kg .(-1)min(-1)), HR(max) (190 vs 175 bpm), RER(max) (1.20 vs 1 .10), V over dot O-2 at T-vent (46.3 vs 42.8 ml . kg .(-1)min(-1)), HR at T-vent (165 vs 152 bpm) for treadmill versus WI running, respectiv ely. Treadmill and WI V over dot (Emax) (109.0 vs 105.8 1 . min(-1)), RPE(max) (20), V over dot (E) at T-vent (66.4 vs 65.7 1 . min(-1)), RE R at T-vent (0.99 vs 0.98), RPE at T-vent (13 vs 12) were similar, as were blood lactate [BLa] values obtained at 30 s (10.4 vs 9.8 mmol . l (-1)) and 5 min (9.7 vs 9.2 mmol . l(-1)) post-test. SF values over ti me were higher on the treadmill. The lower WI V over dot O-2max with s imilar peak [BLa] and lower SF values suggests that the active muscula ture and muscle recruitment patterns differ in WI running due to the h igh viscosity friction of water, and the nonweight-bearing nature of W I running.