There are many possible links between fatigue and weight loss, although they are primarily related because excess weight can lead to fatigue. There are also some health conditions which may cause both symptoms. In some cases, those who are trying to lose weight may become fatigued temporarily during a new workout routine, but this normally goes away once the body adjusts to physical activity. Additionally, certain medications may also cause feelings of sluggishness and weight loss in some patients.
It has been shown that carrying around extra weight can lead to fatigue, sluggishness, and an overall feeling of malaise. This is partially because those who are overweight may be more likely to eat foods low in nutritional value and high in fat and sugars, which cause brief spikes in energy followed by a “crash” soon after as blood sugar plummets. The relationship between fatigue and weight loss in this way is that losing weight and eating a healthier diet combined with exercise, can reduce fatigue and lead to greater overall health and well being.
Sometimes certain medical conditions may lead to fatigue and weight loss, as well as certain medications. Symptoms that last more than a couple of weeks, especially those accompanied by other concerning health issues, should be reported to a doctor. If medications are being taken and side effects begin to interrupt daily life, dosage may need to be altered to alleviate the problem. Health problems which may cause fatigue and weight loss include thyroid disorders, certain cancers, and depression.
Some may also experience fatigue and weight loss during the initial stages of a diet and exercise plan. This can occur for two main reasons. The first is that eating less than normal may cause jitters and fatigue until the body has adjusted to being given less food to run off of each day. Although it is necessary for weight loss, food restrictions can cause sluggishness and a feeling of malaise for a temporary period of time.
Symptoms can also be caused by a rigorous workout schedule. Those who have been sedentary or only mildly active may become very fatigued and tired after engaging in newer and more challenging exercises. This is also typically a temporary state of being, as the body will eventually gain strength and build muscle, leading to more energy and stamina with time.
If fatigue does not go away within two or three weeks from starting a new exercise routine, there may be an underlying medical reason. Usually it is nothing to worry about, and the exercises being done may simply be too strenuous for a beginner to adjust to in a short amount of time. If slowing down and doing fewer repetitions or sets or switching to a low impact workout doesn’t help, exercise should be stopped and a visit to the doctor may be necessary.