Questions about cardio

[MangoBlue]

Hi I am woman and I have some questions about cardio.
I have a treadmill in house and I do jogging every day for 40 minutes with incline 1 after that I walk fast for 15 minutes starting with incline 15 (which is the highest to treadmill) and I reducing by 1 every minute!
I do that at 15:00 every day.
But I realize that body start to get used to this should I change it and what is the best change I can do ??
With the treadmill we loose only body fat??
Also 3 days a week I do strength exercises. Each day different parts of the body but I did them after treadmill. I heard that is better to do strength exercises aftrer cardio but why that ??
I want to keep body fit actually and improve muscles a little bit.
Any answers to questions ??

[swanso5]

alternate 1min at the slowest jog you can do then jack it up as fast as it goes x 1min...if the fastest level is too easy then jack up the incline too....even better go outside and sprint 5 x 50m, 30secs rest...do wts befroe cardio...train full body ech workout only using exercises that use 2 joints and more...think squats, deadlifts, lunges, push ups, rows, pull ups, shoulder presses

[MangoBlue]

So you suggesting me to do 1 min slowest jogging and then 1 min fastest jogging for how long time 10-15 min or more You think that with these I will burn more kcal rather than jogging fro 40 min at medium jogging??

[swanso5]

yes
yes
and..

yes