You're traveling a distance of 4 km on this strenuous trail. The hike is therefore not too long. Average length of all hikes in Tyrol is 14 km.
You shouldn’t forget to bring your hiking boots. There are some sections on the trail where sturdy footwear is required. If you get hungry along the way, there are places to rest and get food. Nevertheless it’s recommended to also have enough water and food in your backpack when hiking or biking.