What weight gloves? Are you wearing headgear and foot guards? I'm guessing adidas bag gloves are similar to 'points' style kickboxing gloves - if not, you should be trying something like this:
http://www.decathlon.co.uk/EN/gba-560-10295283/
If your gloves are as heavy as that, and you can do continuous sparring for say, 90 secs at a time, start kickboxing now, it's much more fun than going down the gym.