Group items tagged

endurance training found to induce heart dysfunction.  This was all in the right ventricular function, but significant dysfunction was found.

decreased testosterone production/secretion in men post exercise. This was more pronounced in resistance training versus endurance training.

New study suggests endurance training can change mitochondria to improve energy production efficiency.

Exercise associated muscle cramps or EAMC is not worked out.  The theories include dehydration, mineral/electrolyte deficiencies, and neuromuscular activity.

Breast cancer survivors (BCS) exhibit decreased physical function and quality of life (QOL) following cancer treatments. Resistance training (RT) may elicit positive changes in physical and mental well-being. This study assessed 27 BCS, pre-and post-intervention (six months) on the following variables: muscular strength (via one repetition maximum (1RM) of chest press and leg extension), physical function (via the Continuous Scale-Physical Functional Performance test) and QOL (via the Short Form-36 survey). RT consisted of two days/week of ten exercises including two sets of 8-12 repetitions at 52%-69% of their 1RM. A repeated measures analysis of variance revealed BCS significantly (p < 0.05) increased upper (71 ± 22 to 89 ± 22 kg) and lower body (74 ± 18 to 93 ± 24 kg) strength, total physical function (65.5 ± 12.1 to 73.6 ± 12.2 units) and the subcomponents of physical function: upper body strength (63.5 ± 16.3 to 71.2 ± 16.8 units), lower body strength (58.5 ± 14.9 to 68.6 ± 16.3 units), balance and coordination (66.5 ± 12.2 to 74.6 ± 11.6 units), and endurance (67.2 ± 12.0 to 75.0 ± 11.6 units). No changes were observed over time for subjective measures of physical function and QOL. Results showed RT could be an effective means to improve objective physical function in BCS. Further research is needed to clarify the effects of RT on subjective physical function and QOL.

Study finds oral vitamin C and vitamin E hamper mitochondrial repair needed in exercise.  

Study finds sprint interval training increases PLIN 2 and PLIN 5 as in endurance training.  PLIN2/5 are increased and play role in intramuscluar triglyceride breakdown.  Increased IMTG is found in IR.  This aids insulin resistance.  Other studies have found that SIT increased PLIN5 > ET.  Exercise impacts muscle and fat through epigenetics.

Summary of 2010 report on marathons and the heart.  Less fit runners can do significant damage to the heart i.e. fibrosis compared to fit runners.  V02 max is a good way to assess aerobic endurance and differentiate between the two.  Dr Larose showed via MRI that it can take 3 months for the heart to recover.

rhodiola improves endurance performance.

Case study finds clomid restores HPA function and normalizes Testosterone production in HPA suppressed endurance athlete.

Nice review of the treatment of hyper/hyponatremia with marathon runners.

Endurance training increases GH more than resistance and sprints/short interval training.  This increase in GH, though seen in all age groups, decreased in older aged men.

exercise increases Testosterone production via catecholamine mechanism.  Free Testosterone increases independent from SHBG affinity.

carbohydrate drinks help to maintain glucose levels in exercise

ibuprofen associated with increased oxidative stress in extreme exercise.

Unintended cardiovascular consequences of extreme training.  

Carbohydrates required to restore muscle/liver glycogen stores.  This older article, abstract available, points to 8-10 grams of carbohydrates/kg body weight.  Though repletion of glycogen stores can occur, recovery of muscle performance may require longer time.  Studies have point to 4-6 days.

High repetition, low weight is associated with improved Heart rate variability, muscle strength and endurance in non-healthy-CAD patients.

Increased risk of atrial fibrillation in men exercising more than 5 days per week.  The study looked at men 45-79.  In contrast, walking and bicycling later in life was associated with decreased risk.

Study finds no improvement in performance with Cordyceps over 5 weeks of treatment.  This study looked at endurance performance via VO2 max.