Aftermath basically means negative impact, so how can a healthy lifestyle have an aftermath? Or rather how can there be any negative impacts of a healthy lifestyle?? 

Well there certainly are ‘the negative impacts’ or dreary consequences, because had this not been true, why would we subject ourselves to living as unhealthily as possible? I have no study or research to corroborate the mentioned, but if answer of the below mentioned is positive, you too are a part of the unhealthy band wagon. 

• I smoke / consume alcohol a little too often (drinking 5 days a week is often)
• I literally survive on packed food, let that be cooked or uncooked
• Sleeping hours … nothing fixed
• Exercise … the work schedule is enough of physical exertion, isn’t that exercising
• I eat fruits … maybe ones a week or ones in fifteen days or maybe even lesser, but yes I do consume fruits
• Vegetables … yes there are vegetables in that cream sandwich or … yes the pizza toppings, they are loaded with healthy vegetables

Difficult to say no to these, right?? After all where is the time to do so much i.e. to cook and eat, sleep on time, go to the park and walk and drink less? There’s just too much of stress already and trying to find affirmative answers to the stated will worsen the situation. There’ll unbearable consequences … see, the link is established.