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.Appropriate physical activity under good guidance of an instructor helps in weight loss
(by reducing the fat content) and simultaneously muscle mass can be improved
protein diet helps you.
2. stretch marks
are hard to reduce ,but regular massaging with cocoa butter creams can help in reduction as well as weight loss can help you in reducing them.it is a time taking procedure to reduce stretch marks by yourself. consulting a dermatologist
or a cosmetologist may be required.
3.For increase in stamina you need to take a balanced diet.If you do not take enough food in order to lose weight, it may not give you strength and stamina for doing the physical activity. hence take food in sufficient amounts (preferably small amounts in frequent intervals ).
hope I answered your queries
feel free to contact me for further queries