One can assess their cardiovascular fitness level at home through simple tests such as the 1-mile walk test or the step test. These assessments gauge heart rate response and recovery after exercise. In the walk test, individuals measure the time taken to walk one mile, while the step test involves stepping at a set pace for a specific duration and measuring heart rate post-exercise. Consistency in performing these tests over time can help track improvements in cardiovascular endurance. Additionally, using wearable devices can provide insights into heart rate and overall fitness levels.