The aim of this study was to analyze the relationships between the head-out aquatic exercise "Jumping jacks" kinematics and the musical cadence in healthy and fit subjects. Five young women, with at least one year of experience conducting head- out aquatic programs were videotaped in the frontal plane, with a pair of cameras providing a double projection (above and below the water surface). Sub...

The process of hemoglobin polymerization and the consequent sickling of red blood cells that occurs in patients with sickle cell disease shortens the half-life of red blood cells. It causes vaso-occlusive complications, as well as pain and pulmonary and cardiovascular dysfunction. We evaluated an aquatic rehabilitation program used for patients with sickle cell anemia and examined the possible ...

Marine mammals have adapted to forage while holding their breath in a suite of aquatic habitats from shallow rivers to deep oceans. The key to tolerate such extensive apnea is the dive response, which comprises bradycardia and peripheral vasoconstriction. Although initially considered an all-or-nothing reflex [1], numerous studies on freely diving marine mammals have revealed substantial dynami...

When aquatic reptiles, birds and mammals submerge, they typically exhibit a dive response in which breathing ceases, heart rate slows, and blood flow to peripheral tissues is reduced. The profound dive response that occurs during forced submergence sequesters blood oxygen for the brain and heart while allowing peripheral tissues to become anaerobic, thus protecting the animal from immediate asp...

The purpose of this study was to: (1) establish the relationship between acute physiological responses and musical cadence; and (2) compare physiologic responses between young and older women. Eighteen older (mean = 65.06 ± 5.77 years) and 19 young (mean = 22.16 ± 2.63 years) women underwent an intermittent and progressive protocol performing the head-out aquatic exercise the "rocking horse." R...

Tattersall GJ, Currie S, LeBlanc DM. Pulmonary and cutaneous O2 gas exchange: a student laboratory exercise in the frog. Adv Physiol Educ 37: 97–105, 2013; doi:10.1152/advan.00087.2012.— Gas exchange in animals is ultimately diffusion based, generally occurring across dedicated respiratory organs. In many aquatic amphibians, however, multiple modes of gas exchange exist, allowing for the partit...

The evolution of air-breathing organs (ABOs) is associated not only with hypoxic environments but also with activity. This investigation examines the effects of hypoxia and exercise on the partitioning of aquatic and aerial oxygen uptake in the Pacific tarpon. The two-species cosmopolitan genus Megalops is unique among teleosts in using swim bladder ABOs in the pelagic marine environment. Small...

BACKGROUND Rheumatologic and geriatric scholarly organisations recommendations for the management of hip and knee osteoarthritis, which emphasise the usefulness of non-pharmacological therapies, are not scaled according to patient's age and physical condition. We conducted a systematic review of clinical trials on exercise and weight loss in hip and knee osteoarthritis in very old patients. M...

BACKGROUND Early multidisciplinary rehabilitation can improve the recovery after total hip arthroplasty (THA). However, optimal exercise therapy has not been defined. We aimed to answer the question: "Which type and/or timing of exercise therapy is effective following THA?" DESIGN Systematic review. METHODS We searched four databases: MEDLINE, PEDro, Cochrane Library, and Cinahl since Janua...