Strenuous swimming raises blood non-enzymatic antioxidant capacity in rats

Abstract

The non-enzymatic antioxidant system protects blood components from oxidative damage and/or injury. Herein, plasma nonenzymatic antioxidant capacity after acute strenuous swimming exercise (Exe) and exercise until exhaustion (Exh) was measured in rats. The experiments were carried out in never exposed (Nex) and pre-exposed (Pex) groups. The Nex group did not undergo any previous training before the acute strenuous swimming test and the Pex group was submitted to daily swimming for 10 min in the first week and 15 min per day in the second week before testing. Plasma glucose, lactate, and pyruvate were measured and plasma total protein sulfhydryl groups (thiol), trolox equivalent antioxidant capacity (TEAC), ferric reducing ability of plasma (FRAP), and total radical-trapping antioxidant parameter (TRAP) levels were evaluated. There were marked increases in plasma lactate concentrations (

The Enhanced Effects of Swimming and Running Preconditioning in an Experimental Model of Myocardial Ischemia/Reperfusion Injury

“…The training protocol began every day early in the morning (9:00 a.m.) for all training sessions. Simultaneously, a maximum of six (6) rats were placed in the water tank [27,28].…”

“…At the end of each week of training, we measured the lactate levels in exercising rats via tail vein punction using a portable lactate monitor and a lancet. To simulate the same stress levels that our exercising groups of animals had, the rats from the control group were also put in water for 1 min per day/5 days a week until the end of the training period [27].…”

“…After the adaptation period, rats subjected to moderate intensity running would run 60 min a day for the next five weeks, gradually increasing the running speed (10-13 m/min) so that in the last week the rats ran at a speed of 15 m/min [26,27]. The total duration of this protocol is 6 weeks including adaptation period.…”

“…High Intensity Interval Training Protocol (High Intensity Interval Running) means that after the adaptation period, rats subjected to high-intensity interval running would run at an intensity of 45 m/min for 30 s from the second week, and after a 3 min rest, this procedure would be repeated in four more cycles. During the next three weeks, both the speed and the duration of running was gradually increased so that in the last week, the rats would run at a speed of 55 m/min for 90 s in five cycles [27]. In order to evaluate and confirm the aerobic or anaerobic type of running in animals from both groups, lactates were measured after each running session (at least three times a week) using a commercial lactometer by puncturing the tail vein [27].…”

Physiological Properties of Platelets in Dutch Calves during the Dairy Phase

“…It includes a lot of components, but platelets have a very significant place in it. Their functional state strongly determines the implementation of hemocirculation processes in all organs (Glamazdin et al, 2021a;Godoy et al, 2022). It is known that many parameters of platelet functioning are very sensitive to various influences from the external environment.…”