Exercise apparatus

1. An apparatus for use in exercise, massage, strength training or muscle stretching, the apparatus comprising:

a first module, wherein the first module is a rod module which has a plurality of openings,

one or more second modules, wherein each second module is detachably securable to the rod module by a plug wherein said plug is removably insertable into an opening in the rod module to thereby detachably secure the second module to the rod module,

wherein the openings in the rod module include:

an axial opening in each end of the rod module,

a plurality of first lateral openings, the first lateral openings being parallel to one another and extending through the rod module at spaced locations along the rod module, and

a plurality of second lateral openings, the second lateral openings also extending through the rod module but in a direction perpendicular to the first lateral openings,

wherein one or more second modules can be detachably secured to the rod module in a plurality of configurations.

2. The apparatus as claimed in claim 1 , wherein the first lateral openings are circular and spaced regularly along a length of the rod module.

3. The apparatus as claimed in claim 2 , wherein the second lateral openings are circular, there are second lateral openings located towards each end of the rod module, each second lateral opening intersects with the axial opening which is in the end of the rod module which said second lateral opening is close to, and each second lateral opening intersects with a first lateral opening.

4. The apparatus as claimed in claim 1 , wherein at least one second module comprises a substantially spherical ball module.

5. The apparatus as claimed in claim 4 , wherein multiple substantially spherical ball modules are provided of the same or differing sizes.

6. The apparatus as claimed in claim 4 wherein, for at least one given ball module, each said given ball module has multiple openings therein which are spaced from one another, each opening being operable to receive a plug, such that the rod module or another module can be detachably secured to the given ball module at more than one location relative to the given ball module, or such that multiple modules can be detachably secured to the given ball module at a time.

7. The apparatus as claimed in claim 1 , wherein at least one second module comprises a substantially hemispherical module.

8. The apparatus as claimed in claim 1 wherein, for at least one second module, the plug by which that second module is detachably securable to another module is part of, and extends from, that second module.

9. The apparatus as claimed in claim 1 wherein, for at least one second module, the plug by which that second module is detachably securable to another module is a separate component from the second module and is detachably securable to the second module to thereby allow the second module to be detachably secured to another module.

10. The apparatus as claimed in claim 1 , wherein at least one second module comprises a strength training module, wherein the strength training module includes an elastic strap and a pair of anchor modules which are releasably securable to the strap at different locations along the strap, and wherein each anchor module is detachably securable to the rod module by a plug.

11. The apparatus as claimed claim 1 , wherein at least one second module comprises a stretching module, wherein the stretching module includes a substantially inelastic belt and a pair of anchor modules which are releasably securable to the belt at different locations along the belt, and wherein each anchor module is detachably securable to the rod module by a plug.

12. The apparatus as claimed claim 1 , wherein at least one plug includes an opening therein, and the apparatus also includes one or more locking pins, each locking pin being operable to insert into the opening in a said plug to inhibit removal of that plug.

13. The apparatus as claimed in claim 12 wherein, the said opening in a plug extends laterally through that plug.

14. The apparatus as claimed claim 1 , wherein two respective second modules can be secured relative to each other such that they are able to rotate relative to each other.

15. The apparatus as claimed claim 1 , wherein two respective second modules can be secured relative to each other such that they are unable to rotate relative to each other.