Spindly vines

I have 2 watermelon plants in my garden. 1 has larger leaves and is now producing watermelons (still too early to harvest). The other plant has very small leaves and long vines. Can I trim the vines in order to get the vines healthier? I know if you trim...

tomato plants they produce larger fruit even though it is less.

I would trim the small vines that arent producing in order to divert energy to the larger vines good luck!