obesity

Q: Unfortunately many of us Muslims are now suffering from obesity including myself. Are there any prescriptions from Islamic sources with which to combat this lifestyle disease and to lose weight?

Q: Please advise on the authenticity of the following:

(1) Narrated by Hadhrat Aaisha (Radiyallahu Anha) that she said: “The first calamity for this nation after the Prophet (Sallallahu Alayhi Wasallam's) death is fullness of their stomachs; when their stomachs became full, they became obese and their hearts weakened and their desires became wild.” - Bukhari

(2) Narrated by Anas bin Malik (Radiyallahu Anhu) that the Prophet (Sallallahu Alayhi Wasallam) said: “It is extravagance that one eats whatever he desires.” - Ibn Majah.

(3) If these are not authenticated, are they correct in their meanings?