Athena Vale
Working out until muscle failure can cause tears, but this depends on the type of exercise and the intensity. Eccentric exercises, where muscles lengthen under load, are more likely to cause microtrauma and muscle soreness. This can lead to Exercise-Induced Muscle Damage (EIMD) or rhabdomyolysis, a rare but life-threatening condition where muscles break down. Intense or unaccustomed exercises can increase the risk of muscle tears, especially for athletes starting a new season or returning from injury. Preventative measures include warming up, progressive training, and adequate rest to avoid overworking muscles and reduce the severity of soreness.
| Characteristics | Values |
|---|---|
| Muscle failure causes tears | Yes, microtears or microtrauma occur during muscle contractions |
| Muscle failure causes damage | Yes, extreme or unaccustomed exercise can cause structural changes and damage to muscles |
| Muscle failure and soreness | Soreness is a byproduct of the muscle healing process, caused by microtears |
| Muscle failure and recovery | Recovery is vital to getting the most muscle growth, and rest days are important |
| Muscle failure and injury prevention | Warm-ups, stretching, and strength training can help prevent muscle tears and injuries |
| Muscle failure and performance | EIMD can cause short-term performance decrements and an increased risk of injury |
| Muscle failure and rhabdomyolysis | Excessive exercise without rest can cause rhabdomyolysis, a rare but life-threatening condition |
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What You'll Learn
Microtears are normal and necessary for muscle growth
While working out until muscle failure can cause tears, it is important to distinguish between microtears and more severe muscle tears or ligament ruptures. Microtears, or microscopic muscle damage, are considered a normal and even necessary part of muscle growth by some. This idea is known as the micro-tear hypothesis.
The micro-tear hypothesis suggests that during intense resistance training, muscle fibres experience tiny tears or microtrauma, which trigger the body to repair and rebuild these fibres, leading to muscle growth. This process of repairing and adapting to microtears to increase muscle mass is called hypertrophy. Orthopaedic surgeon Dr. Michael Karns states, "Microtears are what happen after a muscle gets physically worked... Once these occur, the body sends good nutrition and good blood to the area to heal. This, in turn, is how you grow musculature."
However, it is important to note that the micro-tear hypothesis is a debated topic and has been criticised as an oversimplification of the complex physiological process of muscle growth. While muscle damage may play a role in muscle growth, it is not the sole driver. Studies have shown that eccentric (lengthening) contractions, often associated with increased muscle damage, do not always result in greater hypertrophy compared to concentric (shortening) contractions. Additionally, there is no evidence to suggest that mechanical tension directly causes microtears.
Despite the debate, it is well-established that exercise-induced muscle damage can lead to structural changes and functional consequences. Extreme or unaccustomed eccentric exercise can cause muscle trauma, resulting in soreness, swelling, decreased range of motion, and a transient decrease in strength. Inappropriately high initial workloads can disturb training progress and increase the risk of injuries such as muscle tears or ligament ruptures. Therefore, while microtears may be a normal part of muscle growth, it is crucial to exercise caution and ensure proper programming, nutrition, and recovery to minimise the risk of more severe muscle tears and injuries.
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Eccentric exercises cause more muscle soreness
Eccentric exercises are a type of exercise in which the muscle produces power by extending. They are more effective mechanically when compared to isometric and concentric exercises. However, eccentric exercises can expose muscles to soreness and damage. This soreness is known as Delayed-Onset Muscle Soreness (DOMS) and it emerges a few hours after an eccentric activity, especially in individuals who are not used to this kind of exercise. DOMS causes a temporary decrease in muscle performance, joint movement angle, and muscle power.
DOMS is a muscle damage symptom that occurs after eccentric exercise, but it is not always observed together with muscle damage. Eccentric exercises can cause muscle damage, weakness, and soreness. This soreness is characterised by structural changes involving sarcomere, cytoskeletal, and membrane damage, with an increased permeability of sarcolemma for proteins. The trauma also invokes an inflammatory response and clinically presents itself by swelling, decreased range of motion, increased passive tension, soreness, and a transient decrease in insulin sensitivity.
A study on wheelchair basketball players found a statistically significant increase in blood CK activity and positioning sense loss, and a decrease in the pressure-pain threshold, as well as the shooting percentages in the exercise group when compared with the control. These findings suggest that DOMS negatively affects the upper extremities motor performance of wheelchair basketball players at least 48 hours after eccentric exercise.
Eccentric exercises can also cause muscle tears. Clinical reports suggest that hamstring injuries occur most often as a result of eccentric contractions. It is possible that in some elite sports, the micro-damage from mild eccentric exercise may, as a result of the demands placed on the muscle by the competitive event, progress to more major tears. Eccentric exercises can also lead to rhabdomyolysis, a rare but life-threatening muscle injury where your muscles break down. This condition can occur if you push yourself too hard without resting.
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Muscle damage is more likely with new exercises
Muscle damage is more likely when performing new exercises, particularly those that involve eccentric (lengthening) muscle contractions. Eccentric exercises require you to tense a muscle while simultaneously lengthening it. For example, the controlled, downward motion of straightening your forearm after a bicep curl is an eccentric movement.
Unaccustomed eccentric exercises can cause exercise-induced muscle damage (EIMD), which is characterised by ultrastructural alterations in muscle tissue, reduced muscle strength and range of motion, increased muscle soreness and swelling, and the efflux of myocellular proteins. The risk of EIMD can be reduced by avoiding new training techniques, as well as increases in exercise volume and intensity, within 14 days of competition.
The largest deficits in muscle strength, speed, and agility have been found 48 hours after muscle damage occurs. Muscle strength typically decreases by 20% immediately after exercise and is usually restored within two days. However, when muscle strength decreases by around 50% immediately after exercise, it may take up to seven days to recover.
EIMD can also lead to delayed-onset muscle soreness (DOMS), which typically starts 12 to 24 hours after a workout, with pain peaking one to three days after. DOMS is characterised by muscle pain and stiffness, and in rare cases, severe swelling of the muscles, which can lead to a dangerous condition called compartment syndrome. While DOMS rarely requires a trip to the doctor, it is important to seek medical attention if the pain interferes with your daily activities.
In addition to DOMS, rhabdomyolysis is a rare but serious muscle injury that can occur after excessive exercise without rest. It is characterised by weak and sore muscles and changes in urine colour, and can lead to kidney damage or failure if left untreated. Therefore, it is important to listen to your body and allow for adequate rest and recovery between workouts to prevent muscle damage and injury.
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Muscle tears can damage small blood vessels
Working out until muscle failure can cause tears, and these tears can damage small blood vessels. A muscle strain, pull, or tear implies damage to a muscle or its attaching tendons. This damage can result from overuse, doing the same motions repeatedly, or quick and unexpected movements, like lifting something heavy. When a muscle tears, contractile proteins (actin and myosin) can be damaged, and the muscle cell membrane can bear too much tension, resulting in cellular contents leaking out.
Grade III muscle strain is a complete tear or rupture of the affected muscle, which may require surgical repair. Muscle strains typically involve varying degrees of injury to tiny blood vessels, leading to local bleeding and pain caused by irritated nerve endings. The effects of swelling or local bleeding can be managed early on by applying ice packs to close the blood vessels and maintaining the strained muscle in a relaxed, stretched position.
Exercise-induced muscle damage is characterized by structural changes, including sarcomere, cytoskeletal, and membrane damage, with increased permeability of the sarcolemma for proteins. Eccentric exercises, which involve lowering weights or moving under load, cause more soreness than other activities due to microtrauma. Eccentric exercises are also used to create delayed-onset muscle soreness (DOMS), a common model for studying trauma to skeletal muscle.
Rhabdomyolysis is a rare, life-threatening muscle injury where muscles break down, releasing toxic components into the circulation system and kidneys, potentially causing kidney damage or failure. While rhabdomyolysis can occur to anyone, endurance athletes who push themselves too hard without rest are at a higher risk.
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Warm-ups and stretching reduce the risk of tears
Warm-up exercises and stretching routines are essential components of any physical activity or training programme, as they help to reduce the risk of muscle tears and other injuries. Muscular injuries are a significant issue for athletes and fitness enthusiasts, with skeletal muscle injuries accounting for over 30% of sports medicine clinic visits. Therefore, implementing effective strategies to prevent such injuries is crucial.
Warm-up exercises help increase heart rate, which, in turn, boosts blood flow to the muscles, making them more supple and ready to work. A simple warm-up routine can include light aerobic activities such as walking, jogging, or squats. Additionally, strength training exercises like weight lifting, yoga, or cycling can help build muscle resilience, making them less prone to tears and strains.
Stretching is another critical component of injury prevention. Regular stretching helps loosen muscles, making them more flexible and less susceptible to tearing. It is recommended to stretch two to three times a week for at least 5 minutes each session, with a focus on stretching before and after any physical activity. This practice helps to improve overall flexibility and reduce muscle tension, thereby lowering the risk of tears and strains.
The combination of warm-up exercises and stretching routines has been the subject of various studies, with some research indicating that a warm-up routine followed by stretching within 15 minutes before physical activity can provide the most benefit in terms of injury prevention. For example, one study examined the impact of a prescribed three-minute warm-up and stretching routine during halftime of a game, finding that the intervention group sustained significantly fewer ligament sprains and muscle strains compared to the group that did not perform the routine.
In conclusion, warm-up exercises and stretching routines are vital components of any physical activity or training programme. They help to improve blood flow to the muscles, increase flexibility, and reduce muscle tension, thereby reducing the risk of tears and other injuries. By incorporating these practices into their routines, athletes and fitness enthusiasts can help protect their muscles and maintain their health and performance.
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Frequently asked questions
Yes, working out until muscle failure can cause microscopic tears in your muscles, which is known as Exercise-Induced Muscle Damage (EIMD). This often occurs when an athlete takes on a new or unfamiliar exercise, learns new techniques, or experiences an increase in exercise volume or intensity.
Symptoms of EIMD include muscle soreness, swelling, reduced range of motion, and decreased muscle strength.
To prevent EIMD, it is important to properly warm up before exercising, gradually progress into new exercises, and allow for adequate rest and recovery between workouts.
If you experience EIMD, it is important to give your muscles time to rest and repair. You can also try taking a warm salt bath or using pain relievers to help manage the discomfort.
In rare cases, excessive exercise without rest can lead to a condition called rhabdomyolysis, where muscle fibres break down and enter the bloodstream, potentially causing kidney damage or failure. If you experience symptoms such as muscle weakness, stiffness, or changes in urine colour, seek medical attention promptly.
