References:

Arm Bike Benefits

https://www.everydayhealth.com/workouts-activities/arm-bike-benefits/#:~:text=Arm%20bikes%20offer%20a%20cardiovascular,engaged%20and%20your%20body%20challenged.

8 Ways Exercise Helps Your Joints | Arthritis Foundation

https://www.arthritis.org/health-wellness/healthy-living/physical-activity/getting-started/8-ways-exercise-helps-joints

Fitzgerald, M. (2004). Eight Benefits Of Cross-Training. https://www.runnersworld.com/training/a20813186/eight-benefits-of-cross-training/

How to keep joints lubricated

https://www.baptistjax.com/juice/stories/orthopedics-bones-muscles/8-ways-to-keep-your-joints-healthy#:~:text=How%20movement%20helps%20joints,Bhagratie.

Role of Exercise in Arthritis Management https://www.hopkinsarthritis.org/patient-corner/disease-management/role-of-exercise-in-arthritis-management/

Use of cycle ergometers (arm cranks) on US space flights, starting with Skylab

https://en.wikipedia.org/wiki/Physiological_effects_in_space

Text neck causes and treatments

https://spinehealth.org/wp-content/uploads/2023/02/Tech-Neck-Infographic.pdf

Piruta J, Kułak W. Physiotherapy in Text Neck Syndrome: A Scoping Review of Current Evidence and Future Directions. J Clin Med. 2025 Feb 19 https://pmc.ncbi.nlm.nih.gov/articles/PMC11856789/#abstract1