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Short bursts of high intensity can kill too.
High-Intensity Workouts Can Cause Kidney Damage
Rhabdomyolysis, the breakdown of muscle fibers and release of their toxic protein byproduct into the bloodstream, can result in kidney damage. It’s one major risk factor for those who jump right into these intense workouts glorified for their difficulty. Some of the most common causes of rhabdomyolysis (called “rhabdo” for short) include overexertion, extreme physical activity and trauma to the skeletal muscles—all of which can easily occur as a result of intense, strenuous exercise, marathon running or exercising in hot, humid weather.
Muscle membranes typically wrap around the muscle cell to keep everything intact. In athletic-induced rhabdo, the muscle membrane breaks down and eccentric contractions, shortening of the muscle while it’s being stretched, could be the culprit. An eccentric contraction, like a jump squat, strains the muscle membrane; the more tattered it becomes, the easier it is for its inner contents to leak out. When potassium and myoglobin, a protein found in muscle tissue, enter the bloodstream and reach the kidneys, the result can be deadly if not treated and causes permanent scarring on the kidneys.
Read more at https://www.phillymag.com/be-well-p...-high-intensity-workouts/#ZRjVp45xx06yzurX.99
High-Intensity Workouts Can Cause Kidney Damage
Rhabdomyolysis, the breakdown of muscle fibers and release of their toxic protein byproduct into the bloodstream, can result in kidney damage. It’s one major risk factor for those who jump right into these intense workouts glorified for their difficulty. Some of the most common causes of rhabdomyolysis (called “rhabdo” for short) include overexertion, extreme physical activity and trauma to the skeletal muscles—all of which can easily occur as a result of intense, strenuous exercise, marathon running or exercising in hot, humid weather.
Muscle membranes typically wrap around the muscle cell to keep everything intact. In athletic-induced rhabdo, the muscle membrane breaks down and eccentric contractions, shortening of the muscle while it’s being stretched, could be the culprit. An eccentric contraction, like a jump squat, strains the muscle membrane; the more tattered it becomes, the easier it is for its inner contents to leak out. When potassium and myoglobin, a protein found in muscle tissue, enter the bloodstream and reach the kidneys, the result can be deadly if not treated and causes permanent scarring on the kidneys.
Read more at https://www.phillymag.com/be-well-p...-high-intensity-workouts/#ZRjVp45xx06yzurX.99
British Army revamps its fitness regime, Singapore?
https://www.telegraph.co.uk/news/2018/05/06/end-leather-training-army-gets-new-fitness-regime/
For centuries the British Army has made soldiers endure the excruciating long march carrying full kit to ensure troops were at their peak of physical fitness and combat ready.
But an overhaul of training will now see soldiers also use the latest sports science techniques favoured by footballers and Olympians to get them fighting fit but also protect them from injury.
Instead of new recruits being “thrashed” with “hell for leather” training, they will focus more on short bursts of strength and conditioning work, as well as being given adequate rests to allow their bodies to recover.
The Army’s review of its fitness regime is an attempt to reduce the numbers of those discharged after suffering musculoskeletal injuries, such as torn tendons and ligaments, muscle strains and damage to nerves.
For the last 15 years, such injuries have accounted for about 60 percent of the Army’s medical discharges.
Soldiers training at the Army Foundation College in Harrogate CREDIT: EDDIE MULHOLLAND FOR THE TELEGRAPH
An Army source said the Royal Army Physical Training Corps’ shift in fitness philosophy is an attempt to “bring training into the 21st Century”.
As well as underlining the importance of rest, hydration and nutrition, soldiers will be encouraged to report niggling pains they experience in order to treat injuries early, rather than pretending that suffering in silence is macho.
Meanwhile, more sessions are likely to be carried out in swimming pools because water offers support and reduces impact injuries.
Greater emphasis will also be placed on preparing recruits for the specific physical rigours each unit will be asked to face in the field of battle.
The source added that the Army had learned from conflicts in Iraq and Afghanistan where marching at speed became irrelevant, in part because of the heat and hidden improvised explosives posing a ever-present threat.
“But, there may be a need for a soldier to employ a short burst of intense energy carrying an injured colleague away,” he said.
“We want to make soldiers stronger and better prepared for the jobs that they will face in their unit.
“And, in so doing we also want to reduce injuries. It’s not just about going hell for leather. Professional athletes - footballers, rugby players and Olympians - do not do all out training all of the time.”
Outlining the concept behind the new regime, Major Robert Heagarty, a physiotherapist who also works with British Olympics, said “soldiers need to be fit to run, not just run to get fit”.
In an interview with Soldier, the magazine of the British Army, he said: “Youngsters today don’t do as much physical activity as previous generation so the step from civilian to soldier is bigger than ever before.
“I reviewed our methods with the intent of reducing musculoskeletal injuries and medical discharges without compromising the Army’s physical fitness standards.”
The source insisted that the Army was not adjusting to an influx of the so-called “snowflake generation”, but wanted to prevent injury to ensure that the British Army remained one of the best fighting forces in the world.
An Army spokesperson said: “This new fitness programme will reduce the number of musculoskeletal injuries sustained by soldiers of all ages and ensure our physical training gets our soldiers ready for the rigours of combat.”
