"joined training" is correct and usable in written English.
You can use it to refer to a type of training (e.g., a course or workshop) that two or more people attend at the same time, as in the following example: My friend and I just started a joined training program to become certified personal trainers.
Some Americans have decided to imitate the Kenyans' approach and move to high altitude; in some cases, they joined training groups under the auspices of Team USA, a growing program with four camps nationwide.
Donation activity was higher among staff who joined training (P 0.01).
There are over 50 people across the industry that have volunteered on Diversity VC's data projects, joined training programmes, mentored founders from diverse backgrounds, spoken at schools and universities, contributed to the Guide.
On 9 June, she again left Norfolk, bound for San Pedro, California, where she joined Training Squadron 1, Base Force, United States Fleet.
Instead, he appeared at Headingley to join training with the first-team squad before day three of their LV County Championship match against Yorkshire.
One in five units plan to cut nurse numbers in the next year, according to Bliss's survey, while one in 10 are having their training and education budgets cut and cannot let nurses join training courses because of staff shortages.
"We believe he'll be ready to join training before the start of next season.
All Teachers have the same opportunity to join training or professional development courses about integrating technologies every semester in Taiwan.
When he moved homes with his mother and grandmother to Ibague, his passion for football was indulged by living opposite the training ground for second division side Cooperamos Tolima, where the young Rodriguez would try to join training sessions.
He and Irfan Khalid, described in court as his right-hand man, left their Birmingham homes twice to join training camps linked to al-Qaeda deep within the tribal areas bordering Afghanistan - the second trip ending in the summer of 2011.
"When my teammates from Gaza can't join training or can't travel to a match it affects the whole team," he told VICE News.
