Final answer:
Taking diet pills before exercising can lead to cardiovascular issues such as increased heart rate and hypertension, as well as gastrointestinal problems like indigestion and nausea. These side effects can affect exercise performance and health.
Step-by-step explanation:
A potential side effect of taking diet pills prior to an exercise session includes a range of cardiovascular and gastrointestinal issues. Some of these side effects can be quite severe, such as an increased heart rate, hypertension, and a higher risk of heart attacks. Moreover, you might experience digestive problems like indigestion, heartburn, stomach pain, nausea, diarrhea, or constipation. These side effects can impair physical performance and overall well-being during an exercise session. Additionally, excessive exercise without proper conditioning or rest can lead to overexertion and resulting health complications, highlighting the importance of balanced physical activity and cautious use of weight loss supplements.