Health Risks of Strenuous Exercise for Young Women

A life-threatening condition known as exertional rhabdomyolysis is causing some young women to be admitted to hospitals following intense workouts. The condition, often referred to as rhabdo, occurs when muscle tissue breaks down and leaks proteins and enzymes into the bloodstream.

When these proteins enter the bloodstream in high amounts, they can cause damage to the kidneys. This process can lead to an imbalance of electrolytes, which may result in dehydration and heart issues.

Regional Spike in Cases

Reports indicate a spike in cases of exertional rhabdomyolysis in Newfoundland and Labrador during March 2026.

One instance involved Kyra Fancey, who was 24 years old in 2023. Fancey spent approximately six days in the hospital after attending her first spin class in December 2023.

Fancey described the environment of the class as having blasting music and low lights. She recalled that the instructor was just giving us more instructions on making the resistance on the bike harder and to go faster and to move up and down and you’re dancing on the bike.

Midway through the session, Fancey experienced muscle aches that differed from typical exercise soreness. She stated, I felt my like thighs really giving away, and described the sensation in her right leg as if the muscle had ripped.

Fancey reported feeling pressure to continue the workout because she was unable to detach her feet from the pedals and did not feel she could ask for assistance.

Other Risks of Strenuous Physical Activity

Beyond rhabdomyolysis, research indicates other potential health risks associated with excessive or strenuous exercise in young adults and endurance athletes.

A 2023 report published in Research and Practice in Thrombosis and Haemostasis notes that young adult females are at risk for venous thromboembolism (VTE). The report highlights that a growing number of females have engaged in strenuous physical activity, which is examined as a potential risk factor for VTE.

a study published in the Mayo Clinic Proceedings in June 2012 explored the potential for adverse cardiovascular effects resulting from excessive endurance exercise.

Identifying Over-Exercise

While regular exercise is effective for treating chronic diseases and improving cardiovascular health, there are indicators that an individual may be exercising excessively.

• An inability to perform at the same level as previously achieved
• A requirement for longer periods of rest
• Persistent feelings of tiredness
• Feelings of depression

These signs, as identified by MedlinePlus, suggest that the volume or intensity of physical activity may be exceeding the body’s ability to recover.