Good workout? 18 years old i need to lose at least 30 lbs

Hey there! Guess what, I have the same goal!!! And I'm you're age too!
You do a ton of crunches - but those don't burn calories. I am aiming for an hour of cardio a day for five days a week (Zumba, Step classes at the gym, dancing in my own time, or running). If you wanna burn calories, do as much cardio as you can. Add in your crunches and other weight training exercises (like push ups, squats, or weight lifting) and you'll build muscle, which just having burns calories and raises your metabolism Make sure you also eat healthy (for most of the time) and don't forget to have rest days to let your body relax
My current workout goes something like this:
100 Jumping Jacks
50 crunches (that's a lot for me 'cause I'm muscle-less :P)
20 tricep dips
15 squats (or more!)
20 lunges (each leg)
70 Russian Twists
20 standing calf raises
5 push ups
30 second plank
10 lunge-split-jumps

Do these every day, just increase the numbers by wednesday, then decrease gradually (do even less than this) to Sunday.

Then do your cardio afterwards! That way your muscles are warmed up and already in the burning stages

Good luck! Add me if you like!~

the fastest way to lose weight is TABATA or interval running because it really burns calories. . However, if you want to lose inches you will need to do resistance as well. That being said, the most important thing you can do is focus on your diet.