title: Inspiratory muscle warm-up attenuates muscle deoxygenation during cycling exercise in women athletes.
abstract: This study examines the effects of inspiratory muscle warm-up (IMW) on performance and muscle oxygenation during cycling exercise. In a randomized crossover study of 10 female soccer players, the IMW, placebo (IMWP) and control (CON) trials were conducted before two 6-min submaximal cycling exercises (100 and 150W) followed by intermittent high-intensity sprint (IHIS, 6×10s with 60s recovery). The reduction in tissue saturation index (TSI) in legs in the IMW were significantly less than those in IMWP and CON (P<0.01) during submaximal cycling exercises. The average reduction in TSI during the IHIS test with IMW was significantly less than those in the IMWP and CON (P=0.023). Nevertheless, the IHIS performance with IMW did not differ from that in other trials. In conclusion, the leg TSI during continuous submaximal cycling exercise followed by intermittent sprinting was likely improved by specific IMW (40% maximal inspiratory mouth pressure), which did not enhance IHIS performance.
authors.affiliation: Department of Athletic Performance, National Taiwan Normal University, Taipei, Taiwan.
authors.forename: Ching-Feng
authors.initials: CF
authors.lastname: Cheng
authors.forename: Tomas K
authors.initials: TK
authors.lastname: Tong
authors.forename: Yu-Chi
authors.initials: YC
authors.lastname: Kuo
authors.forename: Pin-Hui
authors.initials: PH
authors.lastname: Chen
authors.forename: Hsin-Wei
authors.initials: HW
authors.lastname: Huang
authors.forename: Chia-Lun
authors.initials: CL
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000641:Ammonia / Q000097:blood; D056352:Athletes; D054874:Athletic Performance; D001642:Bicycling / Q000502:physiology*; D018592:Cross-Over Studies; D005260:Female; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D010101:Oxygen Consumption / Q000502:physiology*; D010108:Oxyhemoglobins / Q000378:metabolism; D010807:Physical Endurance; D011659:Pulmonary Gas Exchange / Q000502:physiology; D012132:Respiratory Muscles / Q000502:physiology*; D016037:Single-Blind Method; D019265:Spectroscopy, Near-Infrared; D018709:Statistics, Nonparametric; D013997:Time Factors; D055815:Young Adult
chemical_list: D006454:Hemoglobins; D010108:Oxyhemoglobins; D019344:Lactic Acid; D000641:Ammonia; C100003:deoxyhemoglobin