I'm looking for a structured workout program, and the 28-day challenge in the BetterMe app caught my eye. How effective and challenging are these workouts?

The 28-day challenges available on the BetterMe app are designed with both effectiveness and adaptability in mind. It's important to recognize that individual experiences may vary due to factors like fitness level, consistency, and adherence to the program.
In essence, the efficiency and difficulty of these exercises can be very advantageous, but ultimately, it depends on your commitment, consistency, and individual fitness goals. It's best to choose a challenge that fits your current level of fitness and then gradually advance to more difficult ones as you get stronger and more self-assured. Remember that each person's fitness results are unique, and BetterMe aims to offer a structured and flexible platform to assist you in reaching your fitness goals.