Biphasic Kinetics of IGF-I and IGFBP-3 in Response to Military Field Training in Brazilian Air Force Recruits.

Introduction: Insulin-like growth factor type I (IGF-I) has gained considerable notoriety in military training, primarily because it is responsible for energy deficits and sensitive to an inadequate protein intake, which are situations that are commonly experienced in specific military operations. Therefore, this study aimed to assess the kinetics of IGF-I and insulin-like growth factor binding protein type 3 (IGFBP-3) in a 4-day military field training exercise.

Materials And Methods: The sample comprised 12 male soldiers (21.

Impact of Complete Intermittent Blood Flow Restriction in Upper Limbs Strength and Neural Function.

We aimed to investigate the chronic effects of low-load strength training (LT) with complete intermittent blood flow restriction (IBFR) on neural adaptations and strength in biceps brachii. Nineteen volunteers were randomly assigned into two different 9-week training protocols consisting of three assessment weeks and six training weeks: (a) LT with complete IBFR (LT-IBFR; n = 10) and (b) LT without complete IBFR (LT; n = 9). Strength was evaluated by predicted 1 repetition maximum (1RM) at weeks 1, 5, and 9 and neural function by root mean square (RMS) and median frequency (MDF) at sessions 1, 7, and 12 during the first three and last three repetitions.

Effects of Theacrine as a Pre-Workout Supplement.

The search to increase physical performance is inherent to physical activity practitioners, and nutrition features are among the alternatives to seeking such an increase. The literature from the area has shown that different substances can promote beneficial effects over physical performance. One substance that has come into the spotlight is theacrine, an alkaloid similar to caffeine, which aims to increase physical performance.

Serum Hormone Concentrations and Body Composition in Brazilian Air Force Cadets During Rainforest Survival Training.

Background: Physiological adaptations in military jungle survival training have not yet been studied. Knowledge about the relationship between the insulin-like growth factor type I (IGF-I)/insulin-like growth factor binding protein type 3 (IGFBP-3) system and survival activities in a jungle environment can improve readiness and prepare Brazilian Air Force cadets for this kind of battlefield. Our goal was to assess changes in body composition and serum concentrations of the IGF-I/IGFBP-3 system in Brazilian Air Force cadets during five-day Amazon rainforest survival training and whether differences in sex influence these variations.

Serum IGF-I concentrations are low in female bodybuilders in the pre-contest phase.

Bodybuilding involves athletes performing a series of poses/postures on the stage so that they can be classified according to their best esthetic and physical appearance during the competition. In the weeks prior to the target competition, the athletes subject themselves to restrictive diets and different physical training methods, as well as using dietary supplementation and, in some cases, anabolic steroids, to reduce body fat to low levels and maintain or increase muscle mass. On the other hand, it is known that physical training is a potent stimulator for releasing the components of the GH/IGF-I axis that are directly linked to the anabolic process.

A Bowling Exergame to Improve Functional Capacity in Older Adults: Co-Design, Development, and Testing to Compare the Progress of Playing Alone Versus Playing With Peers.

Background: Older people often do not meet the recommended levels of exercise required to reduce functional decline. Social interaction is mentioned by this cohort as a reason for joining group-based exercises, which does not occur when exercising alone. This perspective shows that exergames can be used as motivational resources.

Combined training is the most effective training modality to improve aerobic capacity and blood pressure control in people requiring haemodialysis for end-stage renal disease: systematic review and network meta-analysis.

Questions: Do aerobic, resistance and combined exercise training improve aerobic capacity, arterial blood pressure and haemodialysis efficiency in people requiring haemodialysis for end-stage renal disease? Is one exercise training modality better than the others for improving these outcomes?

Design: Systematic review with network meta-analysis of randomised trials.

Participants: Adults requiring haemodialysis for end-stage renal disease.

Intervention: Aerobic training, resistance training, combined training and control (no exercise or placebo).

IGF-1R mRNA expression is increased in obese children.

Objectives: Obese children are often taller than age-matched subjects. Reports on GH and IGF-I levels in obese individuals are controversial, with normal and reduced GH-IGF-I levels having been reported in this group of patients. Thus, the aim of this study was to analyse insulin-like growth factor type 1 receptor (IGF-IR) mRNA expression in obese children.

Peak torque and muscle balance in the knees of young U-15 and U-17 soccer athletes playing various tactical positions.

Background: Soccer is a sport that is practiced worldwide and has been investigated in its various aspects, particularly muscle strength, which is an essential motor skill for sports performance. The objective of this study was to investigate the peak torque and muscle balance on the knee extensor and flexor of young soccer players in the tactical positions of goalkeeper, defender, full back, midfielder, defensive midfielder and striker, as well as to determine which field position has the highest peak torque.

Methods: Forty-nine male players were recruited and divided into two categories during the preparatory period of the season: the Under-15 (U-15) group (N.

Half-ironman induces changes in the kidney function of triathletes.

Long duration exercise may lead to the occurrence of urine abnormalities. Aiming to investigate the effects of triathlon training and competition on the renal function, twelve male triathletes (32.60 ± 5.

[The experience of elderly submitted to complete laryngectomy].

Laryngectomy causes functional and esthetic lesions on the patients, and therefore they need emotional support to resume their activities. This exploratory descriptive study, with a qualitative approach, was developed with 16 elderly patients of Rio Grande do Sul, Brazil, submitted to complete laryngectomy, with the aim of collecting their experience after the surgery. Data were collected using semi-structured interviews.