I need surg for l3-s1 decompression & peek cage l4-s1. while waiting i have bad pain. what kind of strenghting exercises are safe? land? water?

Both: At this time you should concentrate on core muscular strengthening exercises. This will include your lower back.. A combination of aquatic and land based exercises can be utilized to achieve this purpose you're trying to strengthen these muscles in order to make your recovery easier.

Water: Aquatherapy or exercising in the pool will lessen further damage to spine and reduce impact on damaged segments. Discuss regimen options with a physical therapist.

Aquatic therapy/Pool: Activities in water lessen impact and reduce progression of spinal disease. Would discuss with physical therapist.