Back in 1953, researchers discovered that London bus drivers had a greater risk of developing cardiovascular disease than conductors working the same bus. It was the difference between sitting all day and moving around. A new study published in The Lancet looks into the level of exercise needed to negate the effects of driving to work and sitting at a desk 8 hours a day.
Scientists analyzed 16 studies involving more than 1 million adult subjects and grouped them by level of daily exercise. They found that 60 to 75 minutes of moderate intensity exercise per day was enough to make up for the risk created by being inactive for more than 8 hours a day.
“Go heavy or go home.” Think old school bodybuilder saying is it based on real science or bro science? There’s only one way to find out. A study recently published in the Journal of Applied Physiology put it to the test with 49 experienced male weight lifters
Subjects were assigned to 12 weeks of whole body resistance training. Some worked with 30% to 50% of their one rep max (1RM) banging out 20 to 25 reps per set. Others used a heavier load of 75% to 90% of 1RM for between 8 and 12 reps per set. All sets were performed to failure.
After the training period, 1RM increased for both groups with the only difference being the bench press where low reps increased 1RM by 14 kg while high reps produced only a 9 kg increase on average. There were no differences in muscle hypertrophy or the post-workout hormonal response to exercise.
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Protein and amino acid requirements are established using a method known as indicator amino acid oxidation. To find out the amount of amino acids needed to maximize whole body protein synthesis after endurance exercise, researchers applied this tool to lab rats. Findings were published in The Journal of Nutrition.
After dividing the rodents into trained and untrained groups, researchers had their 4-legged subjects run a treadmill for an hour 5 days a week for 6 weeks. Immediately after running, the optimal amino acid intake for trained rats was 26.8 grams per kilogram of body weight.
Inactive rats only needed 15 grams of amino acids per kg of body weight to maximize protein synthesis, and trained rats at rest could get by with 13.3 grams. Humans aren’t rats, of course. What this research suggests is exercise increases your need for amino acids.
There’s a mindset in the weight room that more is better. This generalization holds up for the most part when you’re talking about progressive resistance. But what about when you’re using bands for power training? A study published in the Journal of Strength and Conditioning Research looks at high-load variable resistance as a part of a periodized training program.
Seven college basketball players added 30% of their one rep max (1RM) as band tension one weight room session per week. Another 7 continued their traditional periodized weight training program. Compared to the control group, subjects using bands realized significant increases in rate of power development as well as 1RM bench press, squat and deadlift. They also showed greater gains in muscle mass, 3RM clean and vertical jump height.
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