Global Cycling Network youtube

"Race Winning Intervals Workout" is my Go To workout on hotel or gym spin bikes.
"Sweet Spot Intervals" and "power + endurance" are other GCN workouts I use.

Not free, but know some folks using Aaptiv to work out on a spin bike

It’s not free but you could try Peloton
https://www.onepeloton.com

Better link
https://www.onepeloton.com/ios

The Sufferfest videos can be used without a fancy trainer - I knocked one out at a hotel gym over the holidays.

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" I take my gear out of my car and put my bike together. Tourists and locals are watching from sidewalk cafes. Non-racers. The emptiness of of their lives shocks me. "
(opening lines from Tim Krabbe's The Rider , 1978

I have the same question - thanks for the suggestions. I see spin bikes have their doubters but they have really helped my hill climbing - or is it just my imagination? - I spin twice a week for 30 minutes in a regular spin class which is really designed for basic cardio - and - my times up a 6.2% slope of 1.2 miles have improved from over 10 minutes to 8:22 in 2 months which has moved me up that Strava leaderboard a lot. I do minimal strength work-outs with weights and some running and swimming to improve my cardio.

Can spinning be that helpful? and why??

Couple years ago, I bought a $200 spin bike from Wal-Mart. Gold's Gym branded at that. I do a lot of indoor workouts and have for most of my tri career. I don't know how many thousands of hours I've logged on that thing since I bought it. I use a lot of Spinervals DVDs and I don't feel like I've suffered any compromise in my fitness using that spin bike. I used to have a Kurt Kinetic but I like just hopping on the spin bike without having to set up the trainer. I've also used Lifecycles at the gym and gotten good results. Nothing in the world at all wrong with using a spin bike, as long as you use the same intensity indoors as you do outside.

RP