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Resistance exercise did not increase muscle concentrations of Testosterone in men or women.  The individuals in this study were actively training.  These were not sedentary individuals.

Resistance training to increase endogenous Testosterone production: more specific, the exercise must be high rep or as the authors call it--high volume.  To do this, the weight needs to be light.

good discussion of the effects of resistance training on Testosterone and cortisol in obese men.  The literature is more more clear on the effects of resistance training on healthy men, but the evidence in obese men is less clear--likely due to the disrupted metabolism.

balance: exercise is no different. Cardio plus resistance training increases adiponectin over resistance training alone.

resistance training is not just for the young; new study finds that resistance training in those > 65 reduced all-cause mortality odds.

Though, studies have shown that resistance training increases Testosterone production, this study finds that artificial suppression of Testosterone reduced myogenic response to 8 weeks of resistance training.

Online article reviewing the physiologic adaptation of muscle to resistance training.  The author used the evidence here to point to the most productive resistance training protocol--the RE effort.  The RE effort is the high repetition, lower weight regimen.  However, the RE to failure is critical to the success of RE.

Moderate resistance training program over 8 weeks associated with increased Testosterone production in young and middle age lean men.  Growth hormone was also increased in both groups.  ACTH and cortisol decreased in this lean men.  

Study of 12-14 y/o boys found increased Testosterone after resistance training and plyometric exercise.  Cortisol did increase after plyometric, but not resistance exercise.

resistance exercise found to lower blood pressure.  Another feather in the cap of lifestyle intervention.  The blood pressure lowering effects with resistance training outperformed aerobic exercise.

4 week resistance training program found to increase androgens in urine; this suggests increased androgen production as a result of the resistance program

This study proposes that immediate post-resistance training protein helps to stimulate muscle growth. Recovery from training is just as important as the training itself.

resistance training improves cardiovascular performance.

Only abstract available here: compound resistance treaining in highly trained young men found to increase GH and Testosterone over isolation exercises. Those that trained > 2 years had significnt increase in Testosterone pre/post exercise compared to no statistical change in those traing < 2 years.

no training benefit with pyramid and drop-set workouts compared to traditional resistance training.  The key is repeitition, proper technique and just doing it.

I like this study.  So many men, and women for that matter, focus on cardio for health and weight loss.  In men, low Testosterone is associated with aging as is weight.  This inverse relationship leads to the sarcopenic (belly, manboobs, and thin arms/legs) obesity so prevalent in older men today.  This study found that older men do have lower levels of enzymes and androgens from muscle biopsies as compared to younger men.  A 12 week resistance training regimen of only knee flexion and extension (simple) resulted in increased 3-beta-hydroxysteroid dehydrogenase and 17-beta-hydroxysteroid dehydrogenase.  

Resistance training increases Testosterone in younger and older men.  The effects in older men appears to involve more of a decreased metabolism.  

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 &lt; 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.

12 week study of obese  men in resistance training program finds increase in SHBG and resultant decrease in free Androgen index.  FAI is as a calculation of free Testosterone.  This is different in the studies in lean men which shows an increase in Testosterone. Here a different underlying metabolism is the result

short resistance training program increases SIgA and Salivary Testosterone levels in adults with Downs Syndrome.