Marathon season is in full swing, and thousands of runners across Europe are gearing up for the ultimate endurance test. But what exactly happens to your body during the 42.2-kilometer journey? Here are the seven key effects that running a marathon has on your body.
1. You Temporarily Lose Height
One of the surprising side effects of running a marathon is a temporary loss of height. Research shows that marathon runners can shrink by up to half an inch during the race. This reduction is caused by the compression of spinal discs as the body absorbs the impact of running. The fluid between these discs is squeezed out, leading to a slight decrease in stature that usually returns after recovery.
2. Severe Dehydration Is a Real Risk
Dehydration is a major concern for marathon runners. Over the course of the race, runners can lose as much as 5 kilograms of water weight due to sweating. Staying hydrated is critical, as dehydration can lead to dizziness, nausea, and cramping. Water stations along the course help replenish fluids, but runners must stay mindful of their hydration to avoid severe dehydration that could hinder performance and recovery.
3. Massive Calorie Burn Occurs
Running a marathon is an intense calorie-burning activity. Depending on factors like body composition, age, and fitness level, a runner can burn around 3,500 calories during the race. The primary source of energy during the marathon is carbohydrates, which is why carb-loading the night before the race has become a common strategy. Fueling your body properly before the event ensures you have enough energy to power through the 42.2 kilometers.
4. Hunger Disappears Despite Energy Loss
Even though marathon runners expend large amounts of energy, many report a complete lack of appetite after the race. This phenomenon occurs because blood flow is redirected from the digestive system to muscles and the heart. This shift suppresses the hunger hormone ghrelin, leaving runners with little desire to eat. It can be a surprising experience for those who expect to feel ravenous after such a grueling physical challenge.
5. Sleep Disturbances Are Common
Marathon runners often find themselves struggling with sleep after completing the race. Despite feeling physically exhausted, the high levels of adrenaline and cortisol circulating in the body can make it difficult to fall asleep. These hormones keep the body alert and energized long after crossing the finish line. As a result, many marathoners experience restless nights and find it hard to relax.
6. Expect Some Uncomfortable Physical Aftermath
After the marathon, runners typically face some uncomfortable physical aftermath. Issues like bleeding nipples, severe chafing, and toenail loss are not uncommon for those who cross the finish line. Muscle soreness and stiff legs are also expected in the days following the race, especially for those who push themselves beyond their limits. These physical challenges are a testament to the effort and resilience required to complete such a demanding race.
7. Post-Race Emotional Slumps Happen
After months of training and the excitement of race day, many runners experience what’s known as the “marathon blues.” This emotional slump is common as the routine of training comes to an abrupt end. The fatigue from the physical effort combined with the emotional comedown after achieving a major goal can leave runners feeling a bit lost or down. It’s important for runners to understand that these feelings are normal and part of the post-race recovery process.
Running a marathon is no easy feat, and the physical and mental toll it takes on your body can be significant. From temporary height loss to emotional slumps, the effects of completing 42.2 kilometers are both challenging and transformative. Understanding these changes helps runners prepare mentally and physically for the race, ensuring they can recover and come out stronger. If you’re preparing for a marathon, be ready to embrace the highs and lows of this ultimate endurance challenge.
