Slackline apparatus and training method

A training device comprising:

• a central beam member, the central beam member having a first end and a second end;
• a pair of arcuate outer beam members, one attached to the first end of the central beam member and the other attached to the second end of the central beam member to form an elongate bow-shaped beam assembly;
• and
• a pair of end bracket assemblies supporting the elongate beam assembly therebetween;
• and
• a flexible line extending between the pair of end bracket assemblies configured for a user to perform balance training thereon, wherein each of the end bracket assemblies comprise a plurality of mounting positions for carrying the flexible line such that a vertical distance, measured between the points of engagement of the flexible line to the mounting positions and the central beam member, is adjustable between a plurality of different height settings, each of the plurality of different height settings corresponding to a respective one of the plurality of mounting positions.