Browse the evidence

Exercise induces time- and intensity-dependent physiological, biochemical, and molecular changes in skeletal muscle.

Exercise should be tailored to optimize physiological responses in skeletal muscle.

Increased contractile activity activates key kinases and phosphatases involved in signal transduction.

Understanding these signaling pathways can help in designing effective training programs.

Calcium-dependent signaling pathways play a significant role in regulating carbohydrate and fat metabolism during exercise.

Emphasizing calcium signaling may enhance metabolic responses to exercise.

Plasma TMAO, carnitine, crotonobetaine, and γ-butyrobetaine concentrations were positively associated with fasting insulin level.

Higher levels of these metabolites may indicate increased fasting insulin levels, which could inform dietary or lifestyle interventions.

Low basal muscle sympathetic nerve activity (MSNA) is independently associated with low lipid oxidation.

Practitioners should consider the role of sympathetic nervous activity in lipid oxidation and body weight management.

24-hour respiratory quotient (RQ) is inversely related to muscle sympathetic nerve activity (MSNA).

Understanding the inverse relationship can help in designing interventions for weight management.

Basal MSNA, energy balance, and age explain 45% of the variability in 24-hour RQ.

This highlights the importance of considering multiple factors when assessing metabolic health.

Training muscle groups 1 day per week vs. 2 days per week does not result in significant differences in maximal strength, muscle thickness, or muscle endurance in trained men after 8 weeks.

Both training frequencies can be effective for neuromuscular adaptations.

Further investigations are required to determine whether differences in activation lead to greater muscular adaptations in the muscle complex.

Future studies should explore the link between muscle activation and adaptations to inform training practices.

Training age was not a significant predictor of rating accuracy for RIR.

Coaches should not assume that more experienced lifters will have better RIR accuracy.

The food industry plays a significant role in funding nutrition research.

Practitioners should be aware of the influence of food industry funding on nutrition research.

The CDC has recommended actions to manage conflicts of interest in nutrition research.

Practitioners should consider CDC recommendations when evaluating nutrition research.

There were no significant differences in 24-h energy expenditure (EE) between trained and untrained subjects (2,126 +/- 186 vs. 2,154 +/- 245 kcal).

Endurance training does not significantly alter energy expenditure in sedentary conditions.

There were no significant differences in basal metabolic rate (BMR) between trained and untrained subjects (1,808 +/- 342 vs. 1,709 +/- 329 kcal).

Endurance training does not significantly influence basal metabolic rate.

No relationship was found between maximal aerobic capacity and metabolic rate adjusted for differences in fat-free mass and fat mass.

Maximal aerobic capacity does not predict metabolic rate in sedentary individuals.

Androstenedione supplementation elevated plasma androstenedione 2-3-fold and luteinizing hormone approximately 70%, but did not alter testosterone concentration.

Androstenedione supplementation significantly affects certain hormone levels but does not increase testosterone.

Higher fetuin-A is associated with a 19% higher risk of incident diabetes mellitus in older persons for each 0.10-g/L increase in fetuin-A concentration.

Monitoring fetuin-A levels may help identify older adults at higher risk for developing diabetes.

The association between fetuin-A and incident diabetes mellitus is consistent across sex, race, and cardiovascular disease status.

The findings suggest that fetuin-A could be a universal marker for diabetes risk in older adults, regardless of demographic factors.

The association between fetuin-A and diabetes risk may be attenuated in individuals aged 75 years and older.

Healthcare providers should consider age when evaluating diabetes risk associated with fetuin-A levels.

Nonagenarians had lower absolute and adjusted total energy expenditure (TEE) compared to participants aged 60-74 years, attributed to a reduction in both resting metabolic rate (RMR) and physical activity level.

Older adults may experience significant declines in energy expenditure due to reduced physical activity and metabolic rate.

73% of the reduction in TEE in nonagenarians can be attributed to a reduction in physical activity level.

Understanding the significant role of physical activity in energy expenditure can guide interventions for older adults.

The metabolic syndrome should be redefined as a fat storage condition to better align with its etiology.

Practitioners should consider the implications of redefining metabolic syndrome for treatment strategies.

Obesity in humans is likely a consequence of both genetic predisposition and environmental factors.

Understanding the dual role of genetics and environment can inform obesity prevention strategies.

The loss of the uricase gene may predispose humans to obesity.

Awareness of genetic factors like the uricase gene can enhance obesity risk assessments.