The hosts discuss recent studies on exercise and blood pressure, supplement contamination, and machines vs free weights. They talk about training on medications and the risks involved, as well as powerlifting and upcoming events. They delve into the effects of exercise on blood pressure and managing cardiovascular risk. They highlight inaccurate labeling and contamination in dietary supplements. Lastly, they discuss exercise selection based on goals and intent.
Dietary supplements are often inaccurately labeled and contaminated, making it important to exercise caution when purchasing them.
Aerobic training, resistance training, and isometric exercise can all have a positive impact on reducing blood pressure, but individual factors need to be considered to tailor exercise recommendations.
Deep dives
Many dietary supplements inaccurately labeled and contaminated
A study found that approximately 30% to 50% of dietary supplements are incorrectly labeled and 20% may be contaminated. The most common areas of contamination are muscle-building, sexual enhancement, and weight loss supplements. The lack of pre-market testing by the FDA allows these issues to occur. Manufacturers violators of good manufacturing practices, and some do not register with the FDA. The study tested 57 products and found that 23 of them did not contain the labeled ingredient, and only 6 had the ingredient within 10% of the labeled quantity. 12% of the products contained FDA-prohibited ingredients, including a fedrin-related stimulant and a cardiac stimulant. It is important to be cautious when purchasing dietary supplements due to potential inaccuracies and contamination.
Exercise beneficial for blood pressure management
Exercise, particularly aerobic training and resistance training, has a beneficial impact on blood pressure. Aerobic training can reduce systolic blood pressure by 4.5 millimeters of mercury, while resistance training can lead to a decrease of 4.4 millimeters of mercury. Isometric exercise has the largest effect, lowering systolic blood pressure by 8.2 millimeters of mercury. The response may vary depending on the individual's initial blood pressure, with higher initial blood pressure leading to a greater reduction. Exercise is recommended as part of a comprehensive approach to managing blood pressure, but it is important to consider other factors and medical conditions that may impact blood pressure to tailor recommendations for each individual.
Dangers of Unregulated Supplements
A recent study found that 89% of supplement labels did not accurately declare the ingredients found in the products. There were high rates of contamination and incorrect labeling in the supplement industry, particularly in products marketed as pre-workouts, muscle builders, and nootropics. This poses a significant risk to consumers, as they do not know what they are actually consuming. It is crucial for supplement users to prioritize scientific evidence, ensuring that the supplements they take are supported by research, have a good safety profile, and are manufactured by reputable companies.
Comparing Free Weights and Machines for Strength and Hypertrophy
A new study aims to challenge the long-held belief that free weight-based training is superior to machine-based training for strength and hypertrophy. The study included 38 trained men who followed the same training program, with one group using free weights and the other using machines. After 8 weeks, both groups showed similar improvements in strength and hypertrophy, with no statistically significant differences. The study suggests that exercise selection and individual goals should determine the choice between free weights and machines, rather than a blanket assumption of superiority for either modality.
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Resources:
Exercise Training and Blood Pressure: https://tinyurl.com/4pysssrc
Isometric vs HIIT on HR https://pubmed.ncbi.nlm.nih.gov/34911677/
Previous M/A on BP https://pubmed.ncbi.nlm.nih.gov/30563873/
Hydration Podcast: https://soundcloud.com/user-344313169/211-mixdown-1-01
Supplement Contamination: https://tinyurl.com/4pysssrc
Supplement Safety Podcast: https://soundcloud.com/user-344313169/supplementsafety
Free Weights vs. Machines: https://tinyurl.com/hstrnj4c
Exercise Selection Coaching Theory: https://www.barbellmedicine.com/blog/does-bar-placement-in-the-squat-matter/
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