Because most of the time they are not properly warming up the muscles necessary for the physical activity your partaking in.
Answer:
Assuming you're asking everyone on here--no right or wrong answers;
I recently purchased an immune-boosting powder. I didn't compare any products similar because the brand I purchased seemed to be the most popular one on the market / best-reviewed.
To be more health-literate for future purposes, it's a good idea to read the ingredients and do research!! Despite how highly-rated an item may be, it's almost always beneficial to know what you're putting into your body beforehand.
Hazard, Analysis, Critical, Control, Point.
Answer:
I prefer working individually. I can focus on myself and what I need to do for my body. For individual exercises, you can run or jog around your neighborhood, bike around your neighborhood, do home workouts (like pushups, lunges, pedaling, jumping jacks, etc. For group exercises, you can swim together, run or jog around your area, bike in your neighborhood, go to the gym, etc.
hope this helps!