If you plan on losing weight, then you need a good diet. This can be helped by exercise.
As you're on dumbells you're limited (obviously), but CocCcola's linked routine isn't too bad as a starting point: there are a lot of pointless exercises in it from a weightloss perspective (i.e. they work very small muscle groups), such as calves (wth?), but with the bulk of it stripped out, it would be a useful starting point.
Now weightloss isn't my particular thing, but essentially:
Monday:
1) Goblet squats;
1) Overhead dumbell press;
2) Reverse lunges;
2) Chin-ups;
- Planks (start with 30s, build to a minute).
Wednesday:
1) Single-leg deadlifts (lol);
1) Dumbell row;
2) Dumbell step-ups;
2) Dumbell chest press;
- Side planks (start with 30s, build to a minute);
Friday:
1) Rear-foot elevated squats;
1) Pull-ups;
2) Goblet squats;
2) Push-ups;
- Weighted deadbugs.
I would do this in supersets (1 and 2), with reps around 12-16, depending on the weights of your dumbells, with 4 cuircuits. If you aren't exhausted after each workout, you aren't working hard enough.
Why is there a huge amount of leg work? Because those are your biggest muscles and will burn the most fuel (i.e. flab). They also increase the production of testosterone, which is a good thing (drives muscular development): don't worry, you won't turn into Arnie overnight or in the long term, but you should firm up nicely.
This routine is based on weights only. You could include some cardio if you wish, but if you work hard enough with the routine above, you should get where you want to be, anyway, if you hav an appropriate diet.
So, questions for you:
- What is your diet currently like?
- What are you willing to accept in terms of diet modification?
- How much time to you hvae to workout?
- Body stats?
- History of injuries/predispositions, etc.
