Being injured can often be a huge blow mentally and physically. Injuries can range immensely from strains to fractures and can have a huge range of affects from bruising, swelling, cuts and surgery.
This is why it is important to monitor your training appropriately to prevent long term injuries happening.
Now that races are starting to make a slow reappearance in the calendar, training is starting to feel like it has a purpose again, other than stress relief.