Some things to do for cross training…xc?

my xc team has team runs on monday, tuesday, thursday and friday. wednesday is supposed to be a cross training day by ourselves…the coach said some things to do would be biking or swimming, but i don’t have a bike or access to a swimming pool. would it be okay if i ran by myself anyway? or should i do aerobics? any suggestions are appreciated. thanks!!

How many months would it take me to prepare for a sprint triathlon?

I am moderate running shape. I need a lot of help with the swimming and cycling. I do have access to a swimming pool. Can anyone give me some suggestions on how to get started?

What kind of CrossFit exercises can I do?

I don’t have all of the resource to do all crossfit exercises, but what are some exercises I can do out on the track and in the grass of a soccer field. I have 20 lb weights that I can use but other than that I have no other equipment. I can also use a swimming pool.