Does bicycling aggravate runner's knee and patellar tendinitis?

It can. Acutely you want to reduce your strain on the tendon. You need to stretch your quads and slowly return you activity level in a controlled fashion to allow your tendon to build up tolerance again to the activities you do. Constant straining and loading your patella tendon can be aggravating to it unless done in a controlled environment. Work with your doctor and physical therapist to improve.
It can. Inflammation of the patella due to overuse or repetitive motion. Overuse injuries respond best with rest, ice and nsaids. Therapy helps with decreasing swelling and pain as well as improving strength and range of motion. Recurring tendinitis could be occurring due to needing to improve running form or perhaps needing orthotics.

Related Questions

Any jumper's knee (patellar tendinitis) treatmenet?

Rest first. Ice down the tendon, take a nonsteroid if able, rest and avoid stairs, bikes, jumping jacks. When better do quad sets and isometrics. Avoid things that hurt even 24 hours later. Read more...
Inflammed tendon. Chronic inflammation of the patella tendon, commonly known as "jumper's knee"/ typical treatment options consist of rice, antiinflammatories, physical therapy, counterbrace supports, massage, injections... For more info http://drmarkgalland.Com/platelet-rich-plasma-may-have-edge-in-jumpers-knee/ rarely requires surgery. Read more...

What are the different symptoms for knee tendonitis and patellar tendinitis?

Tendonitis. Pain and swelling at the anterior knee, worse with getting up from a seated position, worse with stairs, squats, lunges, etc. May have some localized warmth, numbness, or tingling. Read more...

Is it safe to use heat around my knee to treat patellar tendinitis?

It can. Inflammation of the patella due to overuse or repetitive motion. Overuse injuries respond best with rest, ice and nsaids. Therapy helps with decreasing swelling and pain as well as improving strength and range of motion. Recurring tendinitis could be occurring due to needing to improve running form or perhaps needing orthotics. Read more...