Having loose arms is very common in women who spend 30 years, especially after having children. If the necessary precautions were not taken, such as gymnastics and healthy eating, the most likely thing is that breasts, abdomen and buttocks, look saggy and the arms will not be the exception.
The 3 selected exercises will not only harden and give strength to your arms, but also, will round your shoulders, lift and firm your chest, and allow you to burn the fat rolls of the back.
Arm flexion
Support the palms of the hands on the chair keeping the body straight and the arms extended. Flex your arms with your elbows back (not sideways) and descend as much as you can without lifting your hips. If at first you find it difficult and low, you can start doing it on the ground until you get some strength in your arms. Always nothing more than a minute.
Minimum dose in one minute:
Beginners: from 10 to 20 repetitions.
Intermediate: .. from 30 to 40 repetitions
Advanced: ... from 50 to 60 repetitions.